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Finding the Fourth Proportional to 1,010.79, 1,516.19 and 317.46

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Solution

The fourth proportional to 1,010.79, 1,516.19 and 317.46 is: 476.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,010.79 : 1,516.19 = 317.46 : x
  2. Step 2: Convert to fraction form
    1,010.79/1,516.19 = 317.46/x
  3. Step 3: Cross multiply
    1,010.79x = 1,516.19 × 317.46
  4. Step 4: Simplify right side
    1,010.79x = 481,329.68
  5. Step 5: Solve for x
    x = 481,329.68/1,010.79
  6. Step 6: Final answer
    x = 476.19

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Double scale
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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.