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Finding the Fourth Proportional to 578,436.80, 867,655.20 and 508,452.80

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Solution

The fourth proportional to 578,436.80, 867,655.20 and 508,452.80 is: 762,679.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,436.80 : 867,655.20 = 508,452.80 : x
  2. Step 2: Convert to fraction form
    578,436.80/867,655.20 = 508,452.80/x
  3. Step 3: Cross multiply
    578,436.80x = 867,655.20 × 508,452.80
  4. Step 4: Simplify right side
    578,436.80x = 441,161,715,874.56
  5. Step 5: Solve for x
    x = 441,161,715,874.56/578,436.80
  6. Step 6: Final answer
    x = 762,679.20

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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.