Home / 717,979.19-990,811.29-395,689.30

Finding the Fourth Proportional to 717,979.19, 990,811.29 and 395,689.30

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Solution

The fourth proportional to 717,979.19, 990,811.29 and 395,689.30 is: 546,051.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,979.19 : 990,811.29 = 395,689.30 : x
  2. Step 2: Convert to fraction form
    717,979.19/990,811.29 = 395,689.30/x
  3. Step 3: Cross multiply
    717,979.19x = 990,811.29 × 395,689.30
  4. Step 4: Simplify right side
    717,979.19x = 392,053,425,772.20
  5. Step 5: Solve for x
    x = 392,053,425,772.20/717,979.19
  6. Step 6: Final answer
    x = 546,051.24

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Double scale
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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.