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Finding the Fourth Proportional to 675.12, 1,013.13 and 455.87

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Solution

The fourth proportional to 675.12, 1,013.13 and 455.87 is: 684.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.12 : 1,013.13 = 455.87 : x
  2. Step 2: Convert to fraction form
    675.12/1,013.13 = 455.87/x
  3. Step 3: Cross multiply
    675.12x = 1,013.13 × 455.87
  4. Step 4: Simplify right side
    675.12x = 461,850.51
  5. Step 5: Solve for x
    x = 461,850.51/675.12
  6. Step 6: Final answer
    x = 684.10

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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.