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Finding the Fourth Proportional to 420,314.82, 580,031.46 and 239,026.72

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Solution

The fourth proportional to 420,314.82, 580,031.46 and 239,026.72 is: 329,855.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,314.82 : 580,031.46 = 239,026.72 : x
  2. Step 2: Convert to fraction form
    420,314.82/580,031.46 = 239,026.72/x
  3. Step 3: Cross multiply
    420,314.82x = 580,031.46 × 239,026.72
  4. Step 4: Simplify right side
    420,314.82x = 138,643,017,380.61
  5. Step 5: Solve for x
    x = 138,643,017,380.61/420,314.82
  6. Step 6: Final answer
    x = 329,855.17

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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.