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Finding the Fourth Proportional to 631,983.70, 872,140.58 and 345,503.79

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Solution

The fourth proportional to 631,983.70, 872,140.58 and 345,503.79 is: 476,796.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,983.70 : 872,140.58 = 345,503.79 : x
  2. Step 2: Convert to fraction form
    631,983.70/872,140.58 = 345,503.79/x
  3. Step 3: Cross multiply
    631,983.70x = 872,140.58 × 345,503.79
  4. Step 4: Simplify right side
    631,983.70x = 301,327,871,442.10
  5. Step 5: Solve for x
    x = 301,327,871,442.10/631,983.70
  6. Step 6: Final answer
    x = 476,796.90

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Half scale
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Double scale
Find fourth proportional to 631,984.70, 872,141.96 and 345,504.79
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.