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Finding the Fourth Proportional to 973.14, 1,342.82 and 553.55

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Solution

The fourth proportional to 973.14, 1,342.82 and 553.55 is: 763.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    973.14 : 1,342.82 = 553.55 : x
  2. Step 2: Convert to fraction form
    973.14/1,342.82 = 553.55/x
  3. Step 3: Cross multiply
    973.14x = 1,342.82 × 553.55
  4. Step 4: Simplify right side
    973.14x = 743,308.53
  5. Step 5: Solve for x
    x = 743,308.53/973.14
  6. Step 6: Final answer
    x = 763.82

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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.