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Finding the Fourth Proportional to 720,557.80, 1,081,451.10 and 321,812.20

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Solution

The fourth proportional to 720,557.80, 1,081,451.10 and 321,812.20 is: 482,992.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,557.80 : 1,081,451.10 = 321,812.20 : x
  2. Step 2: Convert to fraction form
    720,557.80/1,081,451.10 = 321,812.20/x
  3. Step 3: Cross multiply
    720,557.80x = 1,081,451.10 × 321,812.20
  4. Step 4: Simplify right side
    720,557.80x = 348,024,157,683.42
  5. Step 5: Solve for x
    x = 348,024,157,683.42/720,557.80
  6. Step 6: Final answer
    x = 482,992.70

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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.