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Finding the Fourth Proportional to 459,398.40, 687,542.40 and 403,411.20

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Solution

The fourth proportional to 459,398.40, 687,542.40 and 403,411.20 is: 603,751.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,398.40 : 687,542.40 = 403,411.20 : x
  2. Step 2: Convert to fraction form
    459,398.40/687,542.40 = 403,411.20/x
  3. Step 3: Cross multiply
    459,398.40x = 687,542.40 × 403,411.20
  4. Step 4: Simplify right side
    459,398.40x = 277,362,304,634.88
  5. Step 5: Solve for x
    x = 277,362,304,634.88/459,398.40
  6. Step 6: Final answer
    x = 603,751.13

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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.