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Finding the Fourth Proportional to 768,356.84, 1,060,471.20 and 458,279.28

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Solution

The fourth proportional to 768,356.84, 1,060,471.20 and 458,279.28 is: 632,508.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,356.84 : 1,060,471.20 = 458,279.28 : x
  2. Step 2: Convert to fraction form
    768,356.84/1,060,471.20 = 458,279.28/x
  3. Step 3: Cross multiply
    768,356.84x = 1,060,471.20 × 458,279.28
  4. Step 4: Simplify right side
    768,356.84x = 485,991,977,996.74
  5. Step 5: Solve for x
    x = 485,991,977,996.74/768,356.84
  6. Step 6: Final answer
    x = 632,508.17

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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.