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Finding the Fourth Proportional to 715,588.36, 988,378.02 and 521,689

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Solution

The fourth proportional to 715,588.36, 988,378.02 and 521,689 is: 720,562.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,588.36 : 988,378.02 = 521,689 : x
  2. Step 2: Convert to fraction form
    715,588.36/988,378.02 = 521,689/x
  3. Step 3: Cross multiply
    715,588.36x = 988,378.02 × 521,689
  4. Step 4: Simplify right side
    715,588.36x = 515,625,940,875.78
  5. Step 5: Solve for x
    x = 515,625,940,875.78/715,588.36
  6. Step 6: Final answer
    x = 720,562.23

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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.