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Finding the Fourth Proportional to 970.13, 1,455.17 and 320.85

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Solution

The fourth proportional to 970.13, 1,455.17 and 320.85 is: 481.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    970.13 : 1,455.17 = 320.85 : x
  2. Step 2: Convert to fraction form
    970.13/1,455.17 = 320.85/x
  3. Step 3: Cross multiply
    970.13x = 1,455.17 × 320.85
  4. Step 4: Simplify right side
    970.13x = 466,884.02
  5. Step 5: Solve for x
    x = 466,884.02/970.13
  6. Step 6: Final answer
    x = 481.26

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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.