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Finding the Fourth Proportional to 757.52, 1,136.95 and 392.55

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Solution

The fourth proportional to 757.52, 1,136.95 and 392.55 is: 589.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    757.52 : 1,136.95 = 392.55 : x
  2. Step 2: Convert to fraction form
    757.52/1,136.95 = 392.55/x
  3. Step 3: Cross multiply
    757.52x = 1,136.95 × 392.55
  4. Step 4: Simplify right side
    757.52x = 446,307.76
  5. Step 5: Solve for x
    x = 446,307.76/757.52
  6. Step 6: Final answer
    x = 589.17

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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.