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Finding the Fourth Proportional to 834.64, 1,151.68 and 503.20

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Solution

The fourth proportional to 834.64, 1,151.68 and 503.20 is: 694.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    834.64 : 1,151.68 = 503.20 : x
  2. Step 2: Convert to fraction form
    834.64/1,151.68 = 503.20/x
  3. Step 3: Cross multiply
    834.64x = 1,151.68 × 503.20
  4. Step 4: Simplify right side
    834.64x = 579,525.38
  5. Step 5: Solve for x
    x = 579,525.38/834.64
  6. Step 6: Final answer
    x = 694.34

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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.