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Finding the Fourth Proportional to 578,405.80, 866,456.70 and 509,132.20

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Solution

The fourth proportional to 578,405.80, 866,456.70 and 509,132.20 is: 762,684.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,405.80 : 866,456.70 = 509,132.20 : x
  2. Step 2: Convert to fraction form
    578,405.80/866,456.70 = 509,132.20/x
  3. Step 3: Cross multiply
    578,405.80x = 866,456.70 × 509,132.20
  4. Step 4: Simplify right side
    578,405.80x = 441,141,005,875.74
  5. Step 5: Solve for x
    x = 441,141,005,875.74/578,405.80
  6. Step 6: Final answer
    x = 762,684.27

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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.