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Finding the Fourth Proportional to 675.39, 1,013.36 and 310.35

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Solution

The fourth proportional to 675.39, 1,013.36 and 310.35 is: 465.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.39 : 1,013.36 = 310.35 : x
  2. Step 2: Convert to fraction form
    675.39/1,013.36 = 310.35/x
  3. Step 3: Cross multiply
    675.39x = 1,013.36 × 310.35
  4. Step 4: Simplify right side
    675.39x = 314,496.28
  5. Step 5: Solve for x
    x = 314,496.28/675.39
  6. Step 6: Final answer
    x = 465.65

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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.