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Finding the Fourth Proportional to 1,958.80, 2,938.25 and 572.10

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Solution

The fourth proportional to 1,958.80, 2,938.25 and 572.10 is: 858.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,958.80 : 2,938.25 = 572.10 : x
  2. Step 2: Convert to fraction form
    1,958.80/2,938.25 = 572.10/x
  3. Step 3: Cross multiply
    1,958.80x = 2,938.25 × 572.10
  4. Step 4: Simplify right side
    1,958.80x = 1,680,972.83
  5. Step 5: Solve for x
    x = 1,680,972.83/1,958.80
  6. Step 6: Final answer
    x = 858.16

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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.