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Finding the Fourth Proportional to 891,988.54, 1,337,993.74 and 260,915.10

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Solution

The fourth proportional to 891,988.54, 1,337,993.74 and 260,915.10 is: 391,375.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,988.54 : 1,337,993.74 = 260,915.10 : x
  2. Step 2: Convert to fraction form
    891,988.54/1,337,993.74 = 260,915.10/x
  3. Step 3: Cross multiply
    891,988.54x = 1,337,993.74 × 260,915.10
  4. Step 4: Simplify right side
    891,988.54x = 349,102,770,471.47
  5. Step 5: Solve for x
    x = 349,102,770,471.47/891,988.54
  6. Step 6: Final answer
    x = 391,375.85

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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.