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Finding the Fourth Proportional to 425,269.80, 637,904.70 and 172,671.30

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Solution

The fourth proportional to 425,269.80, 637,904.70 and 172,671.30 is: 259,006.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,269.80 : 637,904.70 = 172,671.30 : x
  2. Step 2: Convert to fraction form
    425,269.80/637,904.70 = 172,671.30/x
  3. Step 3: Cross multiply
    425,269.80x = 637,904.70 × 172,671.30
  4. Step 4: Simplify right side
    425,269.80x = 110,147,833,825.11
  5. Step 5: Solve for x
    x = 110,147,833,825.11/425,269.80
  6. Step 6: Final answer
    x = 259,006.95

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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.