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Finding the Fourth Proportional to 459,405.90, 687,553.65 and 403,418.70

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Solution

The fourth proportional to 459,405.90, 687,553.65 and 403,418.70 is: 603,762.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,405.90 : 687,553.65 = 403,418.70 : x
  2. Step 2: Convert to fraction form
    459,405.90/687,553.65 = 403,418.70/x
  3. Step 3: Cross multiply
    459,405.90x = 687,553.65 × 403,418.70
  4. Step 4: Simplify right side
    459,405.90x = 277,371,999,663.26
  5. Step 5: Solve for x
    x = 277,371,999,663.26/459,405.90
  6. Step 6: Final answer
    x = 603,762.38

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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.