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Finding the Fourth Proportional to 758.64, 1,047.24 and 493.46

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Solution

The fourth proportional to 758.64, 1,047.24 and 493.46 is: 681.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.64 : 1,047.24 = 493.46 : x
  2. Step 2: Convert to fraction form
    758.64/1,047.24 = 493.46/x
  3. Step 3: Cross multiply
    758.64x = 1,047.24 × 493.46
  4. Step 4: Simplify right side
    758.64x = 516,771.05
  5. Step 5: Solve for x
    x = 516,771.05/758.64
  6. Step 6: Final answer
    x = 681.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.