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Finding the Fourth Proportional to 1,036.92, 1,554.30 and 646.92

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Solution

The fourth proportional to 1,036.92, 1,554.30 and 646.92 is: 969.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,036.92 : 1,554.30 = 646.92 : x
  2. Step 2: Convert to fraction form
    1,036.92/1,554.30 = 646.92/x
  3. Step 3: Cross multiply
    1,036.92x = 1,554.30 × 646.92
  4. Step 4: Simplify right side
    1,036.92x = 1,005,507.76
  5. Step 5: Solve for x
    x = 1,005,507.76/1,036.92
  6. Step 6: Final answer
    x = 969.71

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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.