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Finding the Fourth Proportional to 802,347.90, 1,107,248.85 and 439,763.82

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Solution

The fourth proportional to 802,347.90, 1,107,248.85 and 439,763.82 is: 606,878.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    802,347.90 : 1,107,248.85 = 439,763.82 : x
  2. Step 2: Convert to fraction form
    802,347.90/1,107,248.85 = 439,763.82/x
  3. Step 3: Cross multiply
    802,347.90x = 1,107,248.85 × 439,763.82
  4. Step 4: Simplify right side
    802,347.90x = 486,927,983,966.61
  5. Step 5: Solve for x
    x = 486,927,983,966.61/802,347.90
  6. Step 6: Final answer
    x = 606,878.87

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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.