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Finding the Fourth Proportional to 1,542.84, 2,128.62 and 953.16

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Solution

The fourth proportional to 1,542.84, 2,128.62 and 953.16 is: 1,315.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,542.84 : 2,128.62 = 953.16 : x
  2. Step 2: Convert to fraction form
    1,542.84/2,128.62 = 953.16/x
  3. Step 3: Cross multiply
    1,542.84x = 2,128.62 × 953.16
  4. Step 4: Simplify right side
    1,542.84x = 2,028,915.44
  5. Step 5: Solve for x
    x = 2,028,915.44/1,542.84
  6. Step 6: Final answer
    x = 1,315.05

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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.