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Finding the Fourth Proportional to 1,530.88, 2,292 and 981.72

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Solution

The fourth proportional to 1,530.88, 2,292 and 981.72 is: 1,469.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,530.88 : 2,292 = 981.72 : x
  2. Step 2: Convert to fraction form
    1,530.88/2,292 = 981.72/x
  3. Step 3: Cross multiply
    1,530.88x = 2,292 × 981.72
  4. Step 4: Simplify right side
    1,530.88x = 2,250,102.24
  5. Step 5: Solve for x
    x = 2,250,102.24/1,530.88
  6. Step 6: Final answer
    x = 1,469.81

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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.