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Finding the Fourth Proportional to 425,615.80, 638,423.70 and 349,508.20

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Solution

The fourth proportional to 425,615.80, 638,423.70 and 349,508.20 is: 524,262.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,615.80 : 638,423.70 = 349,508.20 : x
  2. Step 2: Convert to fraction form
    425,615.80/638,423.70 = 349,508.20/x
  3. Step 3: Cross multiply
    425,615.80x = 638,423.70 × 349,508.20
  4. Step 4: Simplify right side
    425,615.80x = 223,134,318,224.34
  5. Step 5: Solve for x
    x = 223,134,318,224.34/425,615.80
  6. Step 6: Final answer
    x = 524,262.30

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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.