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Finding the Fourth Proportional to 280,655.92, 420,933.12 and 80,927.20

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Solution

The fourth proportional to 280,655.92, 420,933.12 and 80,927.20 is: 121,376.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,655.92 : 420,933.12 = 80,927.20 : x
  2. Step 2: Convert to fraction form
    280,655.92/420,933.12 = 80,927.20/x
  3. Step 3: Cross multiply
    280,655.92x = 420,933.12 × 80,927.20
  4. Step 4: Simplify right side
    280,655.92x = 34,064,938,788.86
  5. Step 5: Solve for x
    x = 34,064,938,788.86/280,655.92
  6. Step 6: Final answer
    x = 121,376.16

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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.