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Finding the Fourth Proportional to 935.31, 1,290.81 and 562.39

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Solution

The fourth proportional to 935.31, 1,290.81 and 562.39 is: 776.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    935.31 : 1,290.81 = 562.39 : x
  2. Step 2: Convert to fraction form
    935.31/1,290.81 = 562.39/x
  3. Step 3: Cross multiply
    935.31x = 1,290.81 × 562.39
  4. Step 4: Simplify right side
    935.31x = 725,938.64
  5. Step 5: Solve for x
    x = 725,938.64/935.31
  6. Step 6: Final answer
    x = 776.15

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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.