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Finding the Fourth Proportional to 973.20, 1,341.48 and 724.12

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Solution

The fourth proportional to 973.20, 1,341.48 and 724.12 is: 998.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    973.20 : 1,341.48 = 724.12 : x
  2. Step 2: Convert to fraction form
    973.20/1,341.48 = 724.12/x
  3. Step 3: Cross multiply
    973.20x = 1,341.48 × 724.12
  4. Step 4: Simplify right side
    973.20x = 971,392.50
  5. Step 5: Solve for x
    x = 971,392.50/973.20
  6. Step 6: Final answer
    x = 998.14

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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.