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Finding the Fourth Proportional to 459,443.40, 687,609.90 and 403,456.20

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Solution

The fourth proportional to 459,443.40, 687,609.90 and 403,456.20 is: 603,818.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,443.40 : 687,609.90 = 403,456.20 : x
  2. Step 2: Convert to fraction form
    459,443.40/687,609.90 = 403,456.20/x
  3. Step 3: Cross multiply
    459,443.40x = 687,609.90 × 403,456.20
  4. Step 4: Simplify right side
    459,443.40x = 277,420,477,336.38
  5. Step 5: Solve for x
    x = 277,420,477,336.38/459,443.40
  6. Step 6: Final answer
    x = 603,818.61

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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.