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Finding the Fourth Proportional to 661,065.49, 991,580.82 and 187,750.90

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Solution

The fourth proportional to 661,065.49, 991,580.82 and 187,750.90 is: 281,621.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,065.49 : 991,580.82 = 187,750.90 : x
  2. Step 2: Convert to fraction form
    661,065.49/991,580.82 = 187,750.90/x
  3. Step 3: Cross multiply
    661,065.49x = 991,580.82 × 187,750.90
  4. Step 4: Simplify right side
    661,065.49x = 186,170,191,377.74
  5. Step 5: Solve for x
    x = 186,170,191,377.74/661,065.49
  6. Step 6: Final answer
    x = 281,621.40

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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.