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Finding the Fourth Proportional to 285,281.28, 393,693 and 156,217.68

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Solution

The fourth proportional to 285,281.28, 393,693 and 156,217.68 is: 215,583.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,281.28 : 393,693 = 156,217.68 : x
  2. Step 2: Convert to fraction form
    285,281.28/393,693 = 156,217.68/x
  3. Step 3: Cross multiply
    285,281.28x = 393,693 × 156,217.68
  4. Step 4: Simplify right side
    285,281.28x = 61,501,807,092.24
  5. Step 5: Solve for x
    x = 61,501,807,092.24/285,281.28
  6. Step 6: Final answer
    x = 215,583.05

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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.