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Finding the Fourth Proportional to 1,840.68, 2,758.93 and 915.30

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Solution

The fourth proportional to 1,840.68, 2,758.93 and 915.30 is: 1,371.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,840.68 : 2,758.93 = 915.30 : x
  2. Step 2: Convert to fraction form
    1,840.68/2,758.93 = 915.30/x
  3. Step 3: Cross multiply
    1,840.68x = 2,758.93 × 915.30
  4. Step 4: Simplify right side
    1,840.68x = 2,525,248.63
  5. Step 5: Solve for x
    x = 2,525,248.63/1,840.68
  6. Step 6: Final answer
    x = 1,371.91

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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.