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Finding the Fourth Proportional to 782.55, 1,173.27 and 392.27

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Solution

The fourth proportional to 782.55, 1,173.27 and 392.27 is: 588.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    782.55 : 1,173.27 = 392.27 : x
  2. Step 2: Convert to fraction form
    782.55/1,173.27 = 392.27/x
  3. Step 3: Cross multiply
    782.55x = 1,173.27 × 392.27
  4. Step 4: Simplify right side
    782.55x = 460,235.69
  5. Step 5: Solve for x
    x = 460,235.69/782.55
  6. Step 6: Final answer
    x = 588.13

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1.5x scale

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.