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Finding the Fourth Proportional to 497.13, 745.69 and 280.70

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Solution

The fourth proportional to 497.13, 745.69 and 280.70 is: 421.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    497.13 : 745.69 = 280.70 : x
  2. Step 2: Convert to fraction form
    497.13/745.69 = 280.70/x
  3. Step 3: Cross multiply
    497.13x = 745.69 × 280.70
  4. Step 4: Simplify right side
    497.13x = 209,315.18
  5. Step 5: Solve for x
    x = 209,315.18/497.13
  6. Step 6: Final answer
    x = 421.05

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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.