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Finding the Fourth Proportional to 977.13, 1,464.39 and 514.80

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Solution

The fourth proportional to 977.13, 1,464.39 and 514.80 is: 771.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    977.13 : 1,464.39 = 514.80 : x
  2. Step 2: Convert to fraction form
    977.13/1,464.39 = 514.80/x
  3. Step 3: Cross multiply
    977.13x = 1,464.39 × 514.80
  4. Step 4: Simplify right side
    977.13x = 753,867.97
  5. Step 5: Solve for x
    x = 753,867.97/977.13
  6. Step 6: Final answer
    x = 771.51

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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.