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Finding the Fourth Proportional to 425,269.80, 637,029.90 and 215,026.20

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Solution

The fourth proportional to 425,269.80, 637,029.90 and 215,026.20 is: 322,096.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,269.80 : 637,029.90 = 215,026.20 : x
  2. Step 2: Convert to fraction form
    425,269.80/637,029.90 = 215,026.20/x
  3. Step 3: Cross multiply
    425,269.80x = 637,029.90 × 215,026.20
  4. Step 4: Simplify right side
    425,269.80x = 136,978,118,683.38
  5. Step 5: Solve for x
    x = 136,978,118,683.38/425,269.80
  6. Step 6: Final answer
    x = 322,096.98

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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.