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Finding the Fourth Proportional to 675.74, 1,013.20 and 310.19

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Solution

The fourth proportional to 675.74, 1,013.20 and 310.19 is: 465.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.74 : 1,013.20 = 310.19 : x
  2. Step 2: Convert to fraction form
    675.74/1,013.20 = 310.19/x
  3. Step 3: Cross multiply
    675.74x = 1,013.20 × 310.19
  4. Step 4: Simplify right side
    675.74x = 314,284.51
  5. Step 5: Solve for x
    x = 314,284.51/675.74
  6. Step 6: Final answer
    x = 465.10

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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.