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Finding the Fourth Proportional to 717,955.62, 990,785.52 and 395,677.32

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Solution

The fourth proportional to 717,955.62, 990,785.52 and 395,677.32 is: 546,038.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,955.62 : 990,785.52 = 395,677.32 : x
  2. Step 2: Convert to fraction form
    717,955.62/990,785.52 = 395,677.32/x
  3. Step 3: Cross multiply
    717,955.62x = 990,785.52 × 395,677.32
  4. Step 4: Simplify right side
    717,955.62x = 392,031,359,248.41
  5. Step 5: Solve for x
    x = 392,031,359,248.41/717,955.62
  6. Step 6: Final answer
    x = 546,038.43

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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.