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Finding the Fourth Proportional to 847.72, 1,170.71 and 701.92

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Solution

The fourth proportional to 847.72, 1,170.71 and 701.92 is: 969.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.72 : 1,170.71 = 701.92 : x
  2. Step 2: Convert to fraction form
    847.72/1,170.71 = 701.92/x
  3. Step 3: Cross multiply
    847.72x = 1,170.71 × 701.92
  4. Step 4: Simplify right side
    847.72x = 821,744.76
  5. Step 5: Solve for x
    x = 821,744.76/847.72
  6. Step 6: Final answer
    x = 969.36

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1.5x scale

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.