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Finding the Fourth Proportional to 282,691.91, 390,116.10 and 155,375.70

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Solution

The fourth proportional to 282,691.91, 390,116.10 and 155,375.70 is: 214,419.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,691.91 : 390,116.10 = 155,375.70 : x
  2. Step 2: Convert to fraction form
    282,691.91/390,116.10 = 155,375.70/x
  3. Step 3: Cross multiply
    282,691.91x = 390,116.10 × 155,375.70
  4. Step 4: Simplify right side
    282,691.91x = 60,614,562,118.77
  5. Step 5: Solve for x
    x = 60,614,562,118.77/282,691.91
  6. Step 6: Final answer
    x = 214,419.16

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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.