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Finding the Fourth Proportional to 631,982.76, 872,100.90 and 345,445.80

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Solution

The fourth proportional to 631,982.76, 872,100.90 and 345,445.80 is: 476,695.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,982.76 : 872,100.90 = 345,445.80 : x
  2. Step 2: Convert to fraction form
    631,982.76/872,100.90 = 345,445.80/x
  3. Step 3: Cross multiply
    631,982.76x = 872,100.90 × 345,445.80
  4. Step 4: Simplify right side
    631,982.76x = 301,263,593,081.22
  5. Step 5: Solve for x
    x = 301,263,593,081.22/631,982.76
  6. Step 6: Final answer
    x = 476,695.90

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Half scale
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Double scale
Find fourth proportional to 631,983.76, 872,102.28 and 345,446.80
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.