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Finding the Fourth Proportional to 1,072.39, 1,479.97 and 652.76

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Solution

The fourth proportional to 1,072.39, 1,479.97 and 652.76 is: 900.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,072.39 : 1,479.97 = 652.76 : x
  2. Step 2: Convert to fraction form
    1,072.39/1,479.97 = 652.76/x
  3. Step 3: Cross multiply
    1,072.39x = 1,479.97 × 652.76
  4. Step 4: Simplify right side
    1,072.39x = 966,064.18
  5. Step 5: Solve for x
    x = 966,064.18/1,072.39
  6. Step 6: Final answer
    x = 900.85

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1.5x scale

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.