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Finding the Fourth Proportional to 1,020.34, 1,529.88 and 472.22

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Solution

The fourth proportional to 1,020.34, 1,529.88 and 472.22 is: 708.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020.34 : 1,529.88 = 472.22 : x
  2. Step 2: Convert to fraction form
    1,020.34/1,529.88 = 472.22/x
  3. Step 3: Cross multiply
    1,020.34x = 1,529.88 × 472.22
  4. Step 4: Simplify right side
    1,020.34x = 722,439.93
  5. Step 5: Solve for x
    x = 722,439.93/1,020.34
  6. Step 6: Final answer
    x = 708.04

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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.