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Finding the Fourth Proportional to 847.44, 1,275.66 and 722.16

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Solution

The fourth proportional to 847.44, 1,275.66 and 722.16 is: 1,087.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.44 : 1,275.66 = 722.16 : x
  2. Step 2: Convert to fraction form
    847.44/1,275.66 = 722.16/x
  3. Step 3: Cross multiply
    847.44x = 1,275.66 × 722.16
  4. Step 4: Simplify right side
    847.44x = 921,230.63
  5. Step 5: Solve for x
    x = 921,230.63/847.44
  6. Step 6: Final answer
    x = 1,087.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.