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Finding the Fourth Proportional to 720,105.30, 1,079,639.55 and 404,658.90

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Solution

The fourth proportional to 720,105.30, 1,079,639.55 and 404,658.90 is: 606,697.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,105.30 : 1,079,639.55 = 404,658.90 : x
  2. Step 2: Convert to fraction form
    720,105.30/1,079,639.55 = 404,658.90/x
  3. Step 3: Cross multiply
    720,105.30x = 1,079,639.55 × 404,658.90
  4. Step 4: Simplify right side
    720,105.30x = 436,885,752,699.50
  5. Step 5: Solve for x
    x = 436,885,752,699.50/720,105.30
  6. Step 6: Final answer
    x = 606,697.04

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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.