Home / 1,214.30-1,675.50-690.26

Finding the Fourth Proportional to 1,214.30, 1,675.50 and 690.26

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Solution

The fourth proportional to 1,214.30, 1,675.50 and 690.26 is: 952.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214.30 : 1,675.50 = 690.26 : x
  2. Step 2: Convert to fraction form
    1,214.30/1,675.50 = 690.26/x
  3. Step 3: Cross multiply
    1,214.30x = 1,675.50 × 690.26
  4. Step 4: Simplify right side
    1,214.30x = 1,156,530.63
  5. Step 5: Solve for x
    x = 1,156,530.63/1,214.30
  6. Step 6: Final answer
    x = 952.43

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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.