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Finding the Fourth Proportional to 1,943.48, 2,915.76 and 847.94

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Solution

The fourth proportional to 1,943.48, 2,915.76 and 847.94 is: 1,272.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,943.48 : 2,915.76 = 847.94 : x
  2. Step 2: Convert to fraction form
    1,943.48/2,915.76 = 847.94/x
  3. Step 3: Cross multiply
    1,943.48x = 2,915.76 × 847.94
  4. Step 4: Simplify right side
    1,943.48x = 2,472,389.53
  5. Step 5: Solve for x
    x = 2,472,389.53/1,943.48
  6. Step 6: Final answer
    x = 1,272.15

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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.