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Finding the Fourth Proportional to 459,490.40, 687,680.40 and 403,503.20

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Solution

The fourth proportional to 459,490.40, 687,680.40 and 403,503.20 is: 603,889.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,490.40 : 687,680.40 = 403,503.20 : x
  2. Step 2: Convert to fraction form
    459,490.40/687,680.40 = 403,503.20/x
  3. Step 3: Cross multiply
    459,490.40x = 687,680.40 × 403,503.20
  4. Step 4: Simplify right side
    459,490.40x = 277,481,241,977.28
  5. Step 5: Solve for x
    x = 277,481,241,977.28/459,490.40
  6. Step 6: Final answer
    x = 603,889.10

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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.