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Finding the Fourth Proportional to 661,507.20, 992,260.80 and 395,130.60

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Solution

The fourth proportional to 661,507.20, 992,260.80 and 395,130.60 is: 592,695.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,507.20 : 992,260.80 = 395,130.60 : x
  2. Step 2: Convert to fraction form
    661,507.20/992,260.80 = 395,130.60/x
  3. Step 3: Cross multiply
    661,507.20x = 992,260.80 × 395,130.60
  4. Step 4: Simplify right side
    661,507.20x = 392,072,605,260.48
  5. Step 5: Solve for x
    x = 392,072,605,260.48/661,507.20
  6. Step 6: Final answer
    x = 592,695.90

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.