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Finding the Fourth Proportional to 747.06, 1,030.08 and 558.06

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Solution

The fourth proportional to 747.06, 1,030.08 and 558.06 is: 769.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    747.06 : 1,030.08 = 558.06 : x
  2. Step 2: Convert to fraction form
    747.06/1,030.08 = 558.06/x
  3. Step 3: Cross multiply
    747.06x = 1,030.08 × 558.06
  4. Step 4: Simplify right side
    747.06x = 574,846.44
  5. Step 5: Solve for x
    x = 574,846.44/747.06
  6. Step 6: Final answer
    x = 769.48

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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.