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Finding the Fourth Proportional to 420,536.94, 580,335.89 and 239,248.47

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Solution

The fourth proportional to 420,536.94, 580,335.89 and 239,248.47 is: 330,159.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,536.94 : 580,335.89 = 239,248.47 : x
  2. Step 2: Convert to fraction form
    420,536.94/580,335.89 = 239,248.47/x
  3. Step 3: Cross multiply
    420,536.94x = 580,335.89 × 239,248.47
  4. Step 4: Simplify right side
    420,536.94x = 138,844,472,572.35
  5. Step 5: Solve for x
    x = 138,844,472,572.35/420,536.94
  6. Step 6: Final answer
    x = 330,159.99

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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.