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Finding the Fourth Proportional to 420,027.71, 579,617.24 and 238,715.69

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Solution

The fourth proportional to 420,027.71, 579,617.24 and 238,715.69 is: 329,415.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,027.71 : 579,617.24 = 238,715.69 : x
  2. Step 2: Convert to fraction form
    420,027.71/579,617.24 = 238,715.69/x
  3. Step 3: Cross multiply
    420,027.71x = 579,617.24 × 238,715.69
  4. Step 4: Simplify right side
    420,027.71x = 138,363,725,290.83
  5. Step 5: Solve for x
    x = 138,363,725,290.83/420,027.71
  6. Step 6: Final answer
    x = 329,415.71

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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.