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Finding the Fourth Proportional to 804,765.70, 1,206,711.15 and 331,498.90

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Solution

The fourth proportional to 804,765.70, 1,206,711.15 and 331,498.90 is: 497,068.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    804,765.70 : 1,206,711.15 = 331,498.90 : x
  2. Step 2: Convert to fraction form
    804,765.70/1,206,711.15 = 331,498.90/x
  3. Step 3: Cross multiply
    804,765.70x = 1,206,711.15 × 331,498.90
  4. Step 4: Simplify right side
    804,765.70x = 400,023,418,842.74
  5. Step 5: Solve for x
    x = 400,023,418,842.74/804,765.70
  6. Step 6: Final answer
    x = 497,068.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.