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Finding the Fourth Proportional to 718,323.88, 991,289.54 and 396,026.92

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Solution

The fourth proportional to 718,323.88, 991,289.54 and 396,026.92 is: 546,518.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,323.88 : 991,289.54 = 396,026.92 : x
  2. Step 2: Convert to fraction form
    718,323.88/991,289.54 = 396,026.92/x
  3. Step 3: Cross multiply
    718,323.88x = 991,289.54 × 396,026.92
  4. Step 4: Simplify right side
    718,323.88x = 392,577,343,354.42
  5. Step 5: Solve for x
    x = 392,577,343,354.42/718,323.88
  6. Step 6: Final answer
    x = 546,518.58

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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.