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Finding the Fourth Proportional to 928.88, 1,281.85 and 536.03

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Solution

The fourth proportional to 928.88, 1,281.85 and 536.03 is: 739.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    928.88 : 1,281.85 = 536.03 : x
  2. Step 2: Convert to fraction form
    928.88/1,281.85 = 536.03/x
  3. Step 3: Cross multiply
    928.88x = 1,281.85 × 536.03
  4. Step 4: Simplify right side
    928.88x = 687,110.06
  5. Step 5: Solve for x
    x = 687,110.06/928.88
  6. Step 6: Final answer
    x = 739.72

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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.