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Finding the Fourth Proportional to 1,397.00, 1,927.80 and 767.53

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Solution

The fourth proportional to 1,397.00, 1,927.80 and 767.53 is: 1,059.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,397.00 : 1,927.80 = 767.53 : x
  2. Step 2: Convert to fraction form
    1,397.00/1,927.80 = 767.53/x
  3. Step 3: Cross multiply
    1,397.00x = 1,927.80 × 767.53
  4. Step 4: Simplify right side
    1,397.00x = 1,479,635.90
  5. Step 5: Solve for x
    x = 1,479,635.90/1,397.00
  6. Step 6: Final answer
    x = 1,059.15

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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.