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Finding the Fourth Proportional to 425,650.80, 637,601.40 and 215,407.20

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Solution

The fourth proportional to 425,650.80, 637,601.40 and 215,407.20 is: 322,668.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,650.80 : 637,601.40 = 215,407.20 : x
  2. Step 2: Convert to fraction form
    425,650.80/637,601.40 = 215,407.20/x
  3. Step 3: Cross multiply
    425,650.80x = 637,601.40 × 215,407.20
  4. Step 4: Simplify right side
    425,650.80x = 137,343,932,290.08
  5. Step 5: Solve for x
    x = 137,343,932,290.08/425,650.80
  6. Step 6: Final answer
    x = 322,668.09

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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.