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Finding the Fourth Proportional to 891,160.11, 1,229,878.62 and 488,829.87

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Solution

The fourth proportional to 891,160.11, 1,229,878.62 and 488,829.87 is: 674,627.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,160.11 : 1,229,878.62 = 488,829.87 : x
  2. Step 2: Convert to fraction form
    891,160.11/1,229,878.62 = 488,829.87/x
  3. Step 3: Cross multiply
    891,160.11x = 1,229,878.62 × 488,829.87
  4. Step 4: Simplify right side
    891,160.11x = 601,201,405,930.38
  5. Step 5: Solve for x
    x = 601,201,405,930.38/891,160.11
  6. Step 6: Final answer
    x = 674,627.82

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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.