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Finding the Fourth Proportional to 720,104.80, 1,079,638.80 and 404,658.40

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Solution

The fourth proportional to 720,104.80, 1,079,638.80 and 404,658.40 is: 606,696.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,104.80 : 1,079,638.80 = 404,658.40 : x
  2. Step 2: Convert to fraction form
    720,104.80/1,079,638.80 = 404,658.40/x
  3. Step 3: Cross multiply
    720,104.80x = 1,079,638.80 × 404,658.40
  4. Step 4: Simplify right side
    720,104.80x = 436,884,909,385.92
  5. Step 5: Solve for x
    x = 436,884,909,385.92/720,104.80
  6. Step 6: Final answer
    x = 606,696.29

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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.