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Finding the Fourth Proportional to 420,360.32, 580,110.02 and 239,098.32

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Solution

The fourth proportional to 420,360.32, 580,110.02 and 239,098.32 is: 329,962.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,360.32 : 580,110.02 = 239,098.32 : x
  2. Step 2: Convert to fraction form
    420,360.32/580,110.02 = 239,098.32/x
  3. Step 3: Cross multiply
    420,360.32x = 580,110.02 × 239,098.32
  4. Step 4: Simplify right side
    420,360.32x = 138,703,331,197.17
  5. Step 5: Solve for x
    x = 138,703,331,197.17/420,360.32
  6. Step 6: Final answer
    x = 329,962.95

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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.