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Finding the Fourth Proportional to 280,261.60, 420,100.80 and 153,707.20

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Solution

The fourth proportional to 280,261.60, 420,100.80 and 153,707.20 is: 230,400.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,261.60 : 420,100.80 = 153,707.20 : x
  2. Step 2: Convert to fraction form
    280,261.60/420,100.80 = 153,707.20/x
  3. Step 3: Cross multiply
    280,261.60x = 420,100.80 × 153,707.20
  4. Step 4: Simplify right side
    280,261.60x = 64,572,517,685.76
  5. Step 5: Solve for x
    x = 64,572,517,685.76/280,261.60
  6. Step 6: Final answer
    x = 230,400.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.