Home / 718,020.97-990,856.08-391,336.92

Finding the Fourth Proportional to 718,020.97, 990,856.08 and 391,336.92

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Solution

The fourth proportional to 718,020.97, 990,856.08 and 391,336.92 is: 540,037.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,020.97 : 990,856.08 = 391,336.92 : x
  2. Step 2: Convert to fraction form
    718,020.97/990,856.08 = 391,336.92/x
  3. Step 3: Cross multiply
    718,020.97x = 990,856.08 × 391,336.92
  4. Step 4: Simplify right side
    718,020.97x = 387,758,566,510.47
  5. Step 5: Solve for x
    x = 387,758,566,510.47/718,020.97
  6. Step 6: Final answer
    x = 540,037.94

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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.