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Finding the Fourth Proportional to 1,253,665, 1,730,057.70 and 717,121

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Solution

The fourth proportional to 1,253,665, 1,730,057.70 and 717,121 is: 989,626.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,253,665 : 1,730,057.70 = 717,121 : x
  2. Step 2: Convert to fraction form
    1,253,665/1,730,057.70 = 717,121/x
  3. Step 3: Cross multiply
    1,253,665x = 1,730,057.70 × 717,121
  4. Step 4: Simplify right side
    1,253,665x = 1,240,660,707,881.70
  5. Step 5: Solve for x
    x = 1,240,660,707,881.70/1,253,665
  6. Step 6: Final answer
    x = 989,626.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.