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Finding the Fourth Proportional to 660,964.11, 991,444.13 and 187,649.79

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Solution

The fourth proportional to 660,964.11, 991,444.13 and 187,649.79 is: 281,474.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,964.11 : 991,444.13 = 187,649.79 : x
  2. Step 2: Convert to fraction form
    660,964.11/991,444.13 = 187,649.79/x
  3. Step 3: Cross multiply
    660,964.11x = 991,444.13 × 187,649.79
  4. Step 4: Simplify right side
    660,964.11x = 186,044,282,791.23
  5. Step 5: Solve for x
    x = 186,044,282,791.23/660,964.11
  6. Step 6: Final answer
    x = 281,474.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.