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Finding the Fourth Proportional to 925.57, 1,285.57 and 899.65

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Solution

The fourth proportional to 925.57, 1,285.57 and 899.65 is: 1,249.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.57 : 1,285.57 = 899.65 : x
  2. Step 2: Convert to fraction form
    925.57/1,285.57 = 899.65/x
  3. Step 3: Cross multiply
    925.57x = 1,285.57 × 899.65
  4. Step 4: Simplify right side
    925.57x = 1,156,563.05
  5. Step 5: Solve for x
    x = 1,156,563.05/925.57
  6. Step 6: Final answer
    x = 1,249.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.