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Finding the Fourth Proportional to 280,003.60, 386,405.16 and 152,679.44

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Solution

The fourth proportional to 280,003.60, 386,405.16 and 152,679.44 is: 210,697.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,003.60 : 386,405.16 = 152,679.44 : x
  2. Step 2: Convert to fraction form
    280,003.60/386,405.16 = 152,679.44/x
  3. Step 3: Cross multiply
    280,003.60x = 386,405.16 × 152,679.44
  4. Step 4: Simplify right side
    280,003.60x = 58,996,123,441.91
  5. Step 5: Solve for x
    x = 58,996,123,441.91/280,003.60
  6. Step 6: Final answer
    x = 210,697.73

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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.