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Finding the Fourth Proportional to 973.62, 1,342.58 and 724.55

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Solution

The fourth proportional to 973.62, 1,342.58 and 724.55 is: 999.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    973.62 : 1,342.58 = 724.55 : x
  2. Step 2: Convert to fraction form
    973.62/1,342.58 = 724.55/x
  3. Step 3: Cross multiply
    973.62x = 1,342.58 × 724.55
  4. Step 4: Simplify right side
    973.62x = 972,756.00
  5. Step 5: Solve for x
    x = 972,756.00/973.62
  6. Step 6: Final answer
    x = 999.11

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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.