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Finding the Fourth Proportional to 983.48, 1,357.17 and 535.35

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Solution

The fourth proportional to 983.48, 1,357.17 and 535.35 is: 738.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.48 : 1,357.17 = 535.35 : x
  2. Step 2: Convert to fraction form
    983.48/1,357.17 = 535.35/x
  3. Step 3: Cross multiply
    983.48x = 1,357.17 × 535.35
  4. Step 4: Simplify right side
    983.48x = 726,560.96
  5. Step 5: Solve for x
    x = 726,560.96/983.48
  6. Step 6: Final answer
    x = 738.77

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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.