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Finding the Fourth Proportional to 745.65, 1,029.20 and 524.70

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Solution

The fourth proportional to 745.65, 1,029.20 and 524.70 is: 724.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.65 : 1,029.20 = 524.70 : x
  2. Step 2: Convert to fraction form
    745.65/1,029.20 = 524.70/x
  3. Step 3: Cross multiply
    745.65x = 1,029.20 × 524.70
  4. Step 4: Simplify right side
    745.65x = 540,018.62
  5. Step 5: Solve for x
    x = 540,018.62/745.65
  6. Step 6: Final answer
    x = 724.23

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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.