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Finding the Fourth Proportional to 282,771, 390,233.10 and 155,455.80

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Solution

The fourth proportional to 282,771, 390,233.10 and 155,455.80 is: 214,534.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,771 : 390,233.10 = 155,455.80 : x
  2. Step 2: Convert to fraction form
    282,771/390,233.10 = 155,455.80/x
  3. Step 3: Cross multiply
    282,771x = 390,233.10 × 155,455.80
  4. Step 4: Simplify right side
    282,771x = 60,663,998,746.98
  5. Step 5: Solve for x
    x = 60,663,998,746.98/282,771
  6. Step 6: Final answer
    x = 214,534.02

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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.