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Finding the Fourth Proportional to 925.63, 1,387.53 and 514.55

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Solution

The fourth proportional to 925.63, 1,387.53 and 514.55 is: 771.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.63 : 1,387.53 = 514.55 : x
  2. Step 2: Convert to fraction form
    925.63/1,387.53 = 514.55/x
  3. Step 3: Cross multiply
    925.63x = 1,387.53 × 514.55
  4. Step 4: Simplify right side
    925.63x = 713,957.03
  5. Step 5: Solve for x
    x = 713,957.03/925.63
  6. Step 6: Final answer
    x = 771.32

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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.