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Finding the Fourth Proportional to 420,149.60, 579,855.47 and 238,888.69

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Solution

The fourth proportional to 420,149.60, 579,855.47 and 238,888.69 is: 329,694.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,149.60 : 579,855.47 = 238,888.69 : x
  2. Step 2: Convert to fraction form
    420,149.60/579,855.47 = 238,888.69/x
  3. Step 3: Cross multiply
    420,149.60x = 579,855.47 × 238,888.69
  4. Step 4: Simplify right side
    420,149.60x = 138,520,910,973.55
  5. Step 5: Solve for x
    x = 138,520,910,973.55/420,149.60
  6. Step 6: Final answer
    x = 329,694.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.