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Finding the Fourth Proportional to 935.17, 1,402.76 and 386.75

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Solution

The fourth proportional to 935.17, 1,402.76 and 386.75 is: 580.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    935.17 : 1,402.76 = 386.75 : x
  2. Step 2: Convert to fraction form
    935.17/1,402.76 = 386.75/x
  3. Step 3: Cross multiply
    935.17x = 1,402.76 × 386.75
  4. Step 4: Simplify right side
    935.17x = 542,515.50
  5. Step 5: Solve for x
    x = 542,515.50/935.17
  6. Step 6: Final answer
    x = 580.13

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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.