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Finding the Fourth Proportional to 1,532, 2,114.16 and 911

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Solution

The fourth proportional to 1,532, 2,114.16 and 911 is: 1,257.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,532 : 2,114.16 = 911 : x
  2. Step 2: Convert to fraction form
    1,532/2,114.16 = 911/x
  3. Step 3: Cross multiply
    1,532x = 2,114.16 × 911
  4. Step 4: Simplify right side
    1,532x = 1,925,999.76
  5. Step 5: Solve for x
    x = 1,925,999.76/1,532
  6. Step 6: Final answer
    x = 1,257.18

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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.