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Finding the Fourth Proportional to 631,982.70, 872,130.24 and 345,501.90

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Solution

The fourth proportional to 631,982.70, 872,130.24 and 345,501.90 is: 476,789.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,982.70 : 872,130.24 = 345,501.90 : x
  2. Step 2: Convert to fraction form
    631,982.70/872,130.24 = 345,501.90/x
  3. Step 3: Cross multiply
    631,982.70x = 872,130.24 × 345,501.90
  4. Step 4: Simplify right side
    631,982.70x = 301,322,654,967.46
  5. Step 5: Solve for x
    x = 301,322,654,967.46/631,982.70
  6. Step 6: Final answer
    x = 476,789.40

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Double scale
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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.