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Finding the Fourth Proportional to 1,036.74, 1,554.30 and 712.74

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Solution

The fourth proportional to 1,036.74, 1,554.30 and 712.74 is: 1,068.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,036.74 : 1,554.30 = 712.74 : x
  2. Step 2: Convert to fraction form
    1,036.74/1,554.30 = 712.74/x
  3. Step 3: Cross multiply
    1,036.74x = 1,554.30 × 712.74
  4. Step 4: Simplify right side
    1,036.74x = 1,107,811.78
  5. Step 5: Solve for x
    x = 1,107,811.78/1,036.74
  6. Step 6: Final answer
    x = 1,068.55

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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.