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Finding the Fourth Proportional to 280,543.80, 420,815.70 and 230,680.20

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Solution

The fourth proportional to 280,543.80, 420,815.70 and 230,680.20 is: 346,020.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,543.80 : 420,815.70 = 230,680.20 : x
  2. Step 2: Convert to fraction form
    280,543.80/420,815.70 = 230,680.20/x
  3. Step 3: Cross multiply
    280,543.80x = 420,815.70 × 230,680.20
  4. Step 4: Simplify right side
    280,543.80x = 97,073,849,839.14
  5. Step 5: Solve for x
    x = 97,073,849,839.14/280,543.80
  6. Step 6: Final answer
    x = 346,020.30

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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.