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Finding the Fourth Proportional to 726,704.10, 1,090,704.15 and 426,809.70

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Solution

The fourth proportional to 726,704.10, 1,090,704.15 and 426,809.70 is: 640,595.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    726,704.10 : 1,090,704.15 = 426,809.70 : x
  2. Step 2: Convert to fraction form
    726,704.10/1,090,704.15 = 426,809.70/x
  3. Step 3: Cross multiply
    726,704.10x = 1,090,704.15 × 426,809.70
  4. Step 4: Simplify right side
    726,704.10x = 465,523,111,050.26
  5. Step 5: Solve for x
    x = 465,523,111,050.26/726,704.10
  6. Step 6: Final answer
    x = 640,595.14

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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.