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Finding the Fourth Proportional to 660,878.60, 991,316.07 and 187,564.41

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Solution

The fourth proportional to 660,878.60, 991,316.07 and 187,564.41 is: 281,346.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,878.60 : 991,316.07 = 187,564.41 : x
  2. Step 2: Convert to fraction form
    660,878.60/991,316.07 = 187,564.41/x
  3. Step 3: Cross multiply
    660,878.60x = 991,316.07 × 187,564.41
  4. Step 4: Simplify right side
    660,878.60x = 185,935,613,793.07
  5. Step 5: Solve for x
    x = 185,935,613,793.07/660,878.60
  6. Step 6: Final answer
    x = 281,346.10

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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.