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Finding the Fourth Proportional to 688.96, 1,033.24 and 256.02

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Solution

The fourth proportional to 688.96, 1,033.24 and 256.02 is: 383.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.96 : 1,033.24 = 256.02 : x
  2. Step 2: Convert to fraction form
    688.96/1,033.24 = 256.02/x
  3. Step 3: Cross multiply
    688.96x = 1,033.24 × 256.02
  4. Step 4: Simplify right side
    688.96x = 264,530.10
  5. Step 5: Solve for x
    x = 264,530.10/688.96
  6. Step 6: Final answer
    x = 383.96

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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.