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Finding the Fourth Proportional to 753.19, 1,039.75 and 554.02

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Solution

The fourth proportional to 753.19, 1,039.75 and 554.02 is: 764.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.19 : 1,039.75 = 554.02 : x
  2. Step 2: Convert to fraction form
    753.19/1,039.75 = 554.02/x
  3. Step 3: Cross multiply
    753.19x = 1,039.75 × 554.02
  4. Step 4: Simplify right side
    753.19x = 576,040.91
  5. Step 5: Solve for x
    x = 576,040.91/753.19
  6. Step 6: Final answer
    x = 764.80

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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.