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Finding the Fourth Proportional to 715,216.13, 986,657.24 and 521,207.87

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Solution

The fourth proportional to 715,216.13, 986,657.24 and 521,207.87 is: 719,018.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,216.13 : 986,657.24 = 521,207.87 : x
  2. Step 2: Convert to fraction form
    715,216.13/986,657.24 = 521,207.87/x
  3. Step 3: Cross multiply
    715,216.13x = 986,657.24 × 521,207.87
  4. Step 4: Simplify right side
    715,216.13x = 514,253,510,941.15
  5. Step 5: Solve for x
    x = 514,253,510,941.15/715,216.13
  6. Step 6: Final answer
    x = 719,018.34

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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.