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Finding the Fourth Proportional to 280,545.60, 420,818.40 and 80,848.20

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Solution

The fourth proportional to 280,545.60, 420,818.40 and 80,848.20 is: 121,272.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,545.60 : 420,818.40 = 80,848.20 : x
  2. Step 2: Convert to fraction form
    280,545.60/420,818.40 = 80,848.20/x
  3. Step 3: Cross multiply
    280,545.60x = 420,818.40 × 80,848.20
  4. Step 4: Simplify right side
    280,545.60x = 34,022,410,166.88
  5. Step 5: Solve for x
    x = 34,022,410,166.88/280,545.60
  6. Step 6: Final answer
    x = 121,272.30

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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.