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Finding the Fourth Proportional to 652.27, 900.13 and 390.29

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Solution

The fourth proportional to 652.27, 900.13 and 390.29 is: 538.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    652.27 : 900.13 = 390.29 : x
  2. Step 2: Convert to fraction form
    652.27/900.13 = 390.29/x
  3. Step 3: Cross multiply
    652.27x = 900.13 × 390.29
  4. Step 4: Simplify right side
    652.27x = 351,306.26
  5. Step 5: Solve for x
    x = 351,306.26/652.27
  6. Step 6: Final answer
    x = 538.59

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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.