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Finding the Fourth Proportional to 1,266.14, 1,899.18 and 572.65

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Solution

The fourth proportional to 1,266.14, 1,899.18 and 572.65 is: 858.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,266.14 : 1,899.18 = 572.65 : x
  2. Step 2: Convert to fraction form
    1,266.14/1,899.18 = 572.65/x
  3. Step 3: Cross multiply
    1,266.14x = 1,899.18 × 572.65
  4. Step 4: Simplify right side
    1,266.14x = 1,087,565.43
  5. Step 5: Solve for x
    x = 1,087,565.43/1,266.14
  6. Step 6: Final answer
    x = 858.96

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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.