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Finding the Fourth Proportional to 440,643.78, 608,092.05 and 239,439.78

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Solution

The fourth proportional to 440,643.78, 608,092.05 and 239,439.78 is: 330,428.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,643.78 : 608,092.05 = 239,439.78 : x
  2. Step 2: Convert to fraction form
    440,643.78/608,092.05 = 239,439.78/x
  3. Step 3: Cross multiply
    440,643.78x = 608,092.05 × 239,439.78
  4. Step 4: Simplify right side
    440,643.78x = 145,601,426,671.75
  5. Step 5: Solve for x
    x = 145,601,426,671.75/440,643.78
  6. Step 6: Final answer
    x = 330,428.87

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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.