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Finding the Fourth Proportional to 1,010.79, 1,515.56 and 317.27

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Solution

The fourth proportional to 1,010.79, 1,515.56 and 317.27 is: 475.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,010.79 : 1,515.56 = 317.27 : x
  2. Step 2: Convert to fraction form
    1,010.79/1,515.56 = 317.27/x
  3. Step 3: Cross multiply
    1,010.79x = 1,515.56 × 317.27
  4. Step 4: Simplify right side
    1,010.79x = 480,832.56
  5. Step 5: Solve for x
    x = 480,832.56/1,010.79
  6. Step 6: Final answer
    x = 475.70

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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.