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Finding the Fourth Proportional to 935.20, 1,402.80 and 497.80

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Solution

The fourth proportional to 935.20, 1,402.80 and 497.80 is: 746.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    935.20 : 1,402.80 = 497.80 : x
  2. Step 2: Convert to fraction form
    935.20/1,402.80 = 497.80/x
  3. Step 3: Cross multiply
    935.20x = 1,402.80 × 497.80
  4. Step 4: Simplify right side
    935.20x = 698,313.84
  5. Step 5: Solve for x
    x = 698,313.84/935.20
  6. Step 6: Final answer
    x = 746.70

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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.