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Finding the Fourth Proportional to 973.98, 1,343.58 and 724.50

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Solution

The fourth proportional to 973.98, 1,343.58 and 724.50 is: 999.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    973.98 : 1,343.58 = 724.50 : x
  2. Step 2: Convert to fraction form
    973.98/1,343.58 = 724.50/x
  3. Step 3: Cross multiply
    973.98x = 1,343.58 × 724.50
  4. Step 4: Simplify right side
    973.98x = 973,423.71
  5. Step 5: Solve for x
    x = 973,423.71/973.98
  6. Step 6: Final answer
    x = 999.43

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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.