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Finding the Fourth Proportional to 425,129.90, 637,676.40 and 158,892.72

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Solution

The fourth proportional to 425,129.90, 637,676.40 and 158,892.72 is: 238,332.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,129.90 : 637,676.40 = 158,892.72 : x
  2. Step 2: Convert to fraction form
    425,129.90/637,676.40 = 158,892.72/x
  3. Step 3: Cross multiply
    425,129.90x = 637,676.40 × 158,892.72
  4. Step 4: Simplify right side
    425,129.90x = 101,322,137,675.81
  5. Step 5: Solve for x
    x = 101,322,137,675.81/425,129.90
  6. Step 6: Final answer
    x = 238,332.18

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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.