Home / 718,390.24-991,385.28-396,111.92

Finding the Fourth Proportional to 718,390.24, 991,385.28 and 396,111.92

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Solution

The fourth proportional to 718,390.24, 991,385.28 and 396,111.92 is: 546,638.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,390.24 : 991,385.28 = 396,111.92 : x
  2. Step 2: Convert to fraction form
    718,390.24/991,385.28 = 396,111.92/x
  3. Step 3: Cross multiply
    718,390.24x = 991,385.28 × 396,111.92
  4. Step 4: Simplify right side
    718,390.24x = 392,699,526,720.54
  5. Step 5: Solve for x
    x = 392,699,526,720.54/718,390.24
  6. Step 6: Final answer
    x = 546,638.17

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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.