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Finding the Fourth Proportional to 459,308.40, 687,407.40 and 403,321.20

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Solution

The fourth proportional to 459,308.40, 687,407.40 and 403,321.20 is: 603,616.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,308.40 : 687,407.40 = 403,321.20 : x
  2. Step 2: Convert to fraction form
    459,308.40/687,407.40 = 403,321.20/x
  3. Step 3: Cross multiply
    459,308.40x = 687,407.40 × 403,321.20
  4. Step 4: Simplify right side
    459,308.40x = 277,245,977,456.88
  5. Step 5: Solve for x
    x = 277,245,977,456.88/459,308.40
  6. Step 6: Final answer
    x = 603,616.17

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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.