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Finding the Fourth Proportional to 488,411.20, 732,616.80 and 409,679.20

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Solution

The fourth proportional to 488,411.20, 732,616.80 and 409,679.20 is: 614,518.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,411.20 : 732,616.80 = 409,679.20 : x
  2. Step 2: Convert to fraction form
    488,411.20/732,616.80 = 409,679.20/x
  3. Step 3: Cross multiply
    488,411.20x = 732,616.80 × 409,679.20
  4. Step 4: Simplify right side
    488,411.20x = 300,137,864,530.56
  5. Step 5: Solve for x
    x = 300,137,864,530.56/488,411.20
  6. Step 6: Final answer
    x = 614,518.80

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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.