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Finding the Fourth Proportional to 983.60, 1,357.34 and 535.47

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Solution

The fourth proportional to 983.60, 1,357.34 and 535.47 is: 738.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.60 : 1,357.34 = 535.47 : x
  2. Step 2: Convert to fraction form
    983.60/1,357.34 = 535.47/x
  3. Step 3: Cross multiply
    983.60x = 1,357.34 × 535.47
  4. Step 4: Simplify right side
    983.60x = 726,816.19
  5. Step 5: Solve for x
    x = 726,816.19/983.60
  6. Step 6: Final answer
    x = 738.94

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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.