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Finding the Fourth Proportional to 425,236.96, 637,878.72 and 172,479.92

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Solution

The fourth proportional to 425,236.96, 637,878.72 and 172,479.92 is: 258,729.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,236.96 : 637,878.72 = 172,479.92 : x
  2. Step 2: Convert to fraction form
    425,236.96/637,878.72 = 172,479.92/x
  3. Step 3: Cross multiply
    425,236.96x = 637,878.72 × 172,479.92
  4. Step 4: Simplify right side
    425,236.96x = 110,021,270,595.30
  5. Step 5: Solve for x
    x = 110,021,270,595.30/425,236.96
  6. Step 6: Final answer
    x = 258,729.32

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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.