Home / 717,451.91-990,102.38-390,777.30

Finding the Fourth Proportional to 717,451.91, 990,102.38 and 390,777.30

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Solution

The fourth proportional to 717,451.91, 990,102.38 and 390,777.30 is: 539,282.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,451.91 : 990,102.38 = 390,777.30 : x
  2. Step 2: Convert to fraction form
    717,451.91/990,102.38 = 390,777.30/x
  3. Step 3: Cross multiply
    717,451.91x = 990,102.38 × 390,777.30
  4. Step 4: Simplify right side
    717,451.91x = 386,909,532,826.09
  5. Step 5: Solve for x
    x = 386,909,532,826.09/717,451.91
  6. Step 6: Final answer
    x = 539,282.88

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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.