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Finding the Fourth Proportional to 817.52, 1,128.72 and 522.92

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Solution

The fourth proportional to 817.52, 1,128.72 and 522.92 is: 721.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    817.52 : 1,128.72 = 522.92 : x
  2. Step 2: Convert to fraction form
    817.52/1,128.72 = 522.92/x
  3. Step 3: Cross multiply
    817.52x = 1,128.72 × 522.92
  4. Step 4: Simplify right side
    817.52x = 590,230.26
  5. Step 5: Solve for x
    x = 590,230.26/817.52
  6. Step 6: Final answer
    x = 721.98

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1.5x scale

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.