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Finding the Fourth Proportional to 1,054, 1,455.12 and 681.52

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Solution

The fourth proportional to 1,054, 1,455.12 and 681.52 is: 940.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,054 : 1,455.12 = 681.52 : x
  2. Step 2: Convert to fraction form
    1,054/1,455.12 = 681.52/x
  3. Step 3: Cross multiply
    1,054x = 1,455.12 × 681.52
  4. Step 4: Simplify right side
    1,054x = 991,693.38
  5. Step 5: Solve for x
    x = 991,693.38/1,054
  6. Step 6: Final answer
    x = 940.89

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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.