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Finding the Fourth Proportional to 425,514.60, 638,271.90 and 268,439.40

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Solution

The fourth proportional to 425,514.60, 638,271.90 and 268,439.40 is: 402,659.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,514.60 : 638,271.90 = 268,439.40 : x
  2. Step 2: Convert to fraction form
    425,514.60/638,271.90 = 268,439.40/x
  3. Step 3: Cross multiply
    425,514.60x = 638,271.90 × 268,439.40
  4. Step 4: Simplify right side
    425,514.60x = 171,337,325,872.86
  5. Step 5: Solve for x
    x = 171,337,325,872.86/425,514.60
  6. Step 6: Final answer
    x = 402,659.10

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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.