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Finding the Fourth Proportional to 285,715.47, 394,291.79 and 156,665.73

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Solution

The fourth proportional to 285,715.47, 394,291.79 and 156,665.73 is: 216,201.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,715.47 : 394,291.79 = 156,665.73 : x
  2. Step 2: Convert to fraction form
    285,715.47/394,291.79 = 156,665.73/x
  3. Step 3: Cross multiply
    285,715.47x = 394,291.79 × 156,665.73
  4. Step 4: Simplify right side
    285,715.47x = 61,772,010,330.03
  5. Step 5: Solve for x
    x = 61,772,010,330.03/285,715.47
  6. Step 6: Final answer
    x = 216,201.14

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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.