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Finding the Fourth Proportional to 718,262.32, 991,209.63 and 395,983.96

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Solution

The fourth proportional to 718,262.32, 991,209.63 and 395,983.96 is: 546,462.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,262.32 : 991,209.63 = 395,983.96 : x
  2. Step 2: Convert to fraction form
    718,262.32/991,209.63 = 395,983.96/x
  3. Step 3: Cross multiply
    718,262.32x = 991,209.63 × 395,983.96
  4. Step 4: Simplify right side
    718,262.32x = 392,503,109,521.49
  5. Step 5: Solve for x
    x = 392,503,109,521.49/718,262.32
  6. Step 6: Final answer
    x = 546,462.07

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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.