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Finding the Fourth Proportional to 278,807.76, 384,760.44 and 151,491.60

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Solution

The fourth proportional to 278,807.76, 384,760.44 and 151,491.60 is: 209,061.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,807.76 : 384,760.44 = 151,491.60 : x
  2. Step 2: Convert to fraction form
    278,807.76/384,760.44 = 151,491.60/x
  3. Step 3: Cross multiply
    278,807.76x = 384,760.44 × 151,491.60
  4. Step 4: Simplify right side
    278,807.76x = 58,287,974,672.30
  5. Step 5: Solve for x
    x = 58,287,974,672.30/278,807.76
  6. Step 6: Final answer
    x = 209,061.52

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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.