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Finding the Fourth Proportional to 660,878.12, 991,318.13 and 162,242.12

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Solution

The fourth proportional to 660,878.12, 991,318.13 and 162,242.12 is: 243,363.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,878.12 : 991,318.13 = 162,242.12 : x
  2. Step 2: Convert to fraction form
    660,878.12/991,318.13 = 162,242.12/x
  3. Step 3: Cross multiply
    660,878.12x = 991,318.13 × 162,242.12
  4. Step 4: Simplify right side
    660,878.12x = 160,833,554,194.43
  5. Step 5: Solve for x
    x = 160,833,554,194.43/660,878.12
  6. Step 6: Final answer
    x = 243,363.41

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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.