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Finding the Fourth Proportional to 876.22, 1,314.18 and 291.18

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Solution

The fourth proportional to 876.22, 1,314.18 and 291.18 is: 436.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.22 : 1,314.18 = 291.18 : x
  2. Step 2: Convert to fraction form
    876.22/1,314.18 = 291.18/x
  3. Step 3: Cross multiply
    876.22x = 1,314.18 × 291.18
  4. Step 4: Simplify right side
    876.22x = 382,662.93
  5. Step 5: Solve for x
    x = 382,662.93/876.22
  6. Step 6: Final answer
    x = 436.72

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Double scale
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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.