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Finding the Fourth Proportional to 716,148.50, 988,309.77 and 393,882.98

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Solution

The fourth proportional to 716,148.50, 988,309.77 and 393,882.98 is: 543,572.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,148.50 : 988,309.77 = 393,882.98 : x
  2. Step 2: Convert to fraction form
    716,148.50/988,309.77 = 393,882.98/x
  3. Step 3: Cross multiply
    716,148.50x = 988,309.77 × 393,882.98
  4. Step 4: Simplify right side
    716,148.50x = 389,278,397,370.72
  5. Step 5: Solve for x
    x = 389,278,397,370.72/716,148.50
  6. Step 6: Final answer
    x = 543,572.17

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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.