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Finding the Fourth Proportional to 716,036.88, 988,146.92 and 393,726.48

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Solution

The fourth proportional to 716,036.88, 988,146.92 and 393,726.48 is: 543,351.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,036.88 : 988,146.92 = 393,726.48 : x
  2. Step 2: Convert to fraction form
    716,036.88/988,146.92 = 393,726.48/x
  3. Step 3: Cross multiply
    716,036.88x = 988,146.92 × 393,726.48
  4. Step 4: Simplify right side
    716,036.88x = 389,059,608,534.44
  5. Step 5: Solve for x
    x = 389,059,608,534.44/716,036.88
  6. Step 6: Final answer
    x = 543,351.35

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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.