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Finding the Fourth Proportional to 425,139.60, 637,742.34 and 172,299.72

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Solution

The fourth proportional to 425,139.60, 637,742.34 and 172,299.72 is: 258,462.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,139.60 : 637,742.34 = 172,299.72 : x
  2. Step 2: Convert to fraction form
    425,139.60/637,742.34 = 172,299.72/x
  3. Step 3: Cross multiply
    425,139.60x = 637,742.34 × 172,299.72
  4. Step 4: Simplify right side
    425,139.60x = 109,882,826,614.15
  5. Step 5: Solve for x
    x = 109,882,826,614.15/425,139.60
  6. Step 6: Final answer
    x = 258,462.93

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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.