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Finding the Fourth Proportional to 847.58, 1,170.18 and 671.26

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Solution

The fourth proportional to 847.58, 1,170.18 and 671.26 is: 926.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.58 : 1,170.18 = 671.26 : x
  2. Step 2: Convert to fraction form
    847.58/1,170.18 = 671.26/x
  3. Step 3: Cross multiply
    847.58x = 1,170.18 × 671.26
  4. Step 4: Simplify right side
    847.58x = 785,492.10
  5. Step 5: Solve for x
    x = 785,492.10/847.58
  6. Step 6: Final answer
    x = 926.75

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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.