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Finding the Fourth Proportional to 385,718.90, 578,616.41 and 132,966.12

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Solution

The fourth proportional to 385,718.90, 578,616.41 and 132,966.12 is: 199,462.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,718.90 : 578,616.41 = 132,966.12 : x
  2. Step 2: Convert to fraction form
    385,718.90/578,616.41 = 132,966.12/x
  3. Step 3: Cross multiply
    385,718.90x = 578,616.41 × 132,966.12
  4. Step 4: Simplify right side
    385,718.90x = 76,936,381,508.26
  5. Step 5: Solve for x
    x = 76,936,381,508.26/385,718.90
  6. Step 6: Final answer
    x = 199,462.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.