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Finding the Fourth Proportional to 724.84, 1,085.58 and 451.16

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Solution

The fourth proportional to 724.84, 1,085.58 and 451.16 is: 675.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.84 : 1,085.58 = 451.16 : x
  2. Step 2: Convert to fraction form
    724.84/1,085.58 = 451.16/x
  3. Step 3: Cross multiply
    724.84x = 1,085.58 × 451.16
  4. Step 4: Simplify right side
    724.84x = 489,770.27
  5. Step 5: Solve for x
    x = 489,770.27/724.84
  6. Step 6: Final answer
    x = 675.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.