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Finding the Fourth Proportional to 1,010.95, 1,516.42 and 317.72

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Solution

The fourth proportional to 1,010.95, 1,516.42 and 317.72 is: 476.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,010.95 : 1,516.42 = 317.72 : x
  2. Step 2: Convert to fraction form
    1,010.95/1,516.42 = 317.72/x
  3. Step 3: Cross multiply
    1,010.95x = 1,516.42 × 317.72
  4. Step 4: Simplify right side
    1,010.95x = 481,796.17
  5. Step 5: Solve for x
    x = 481,796.17/1,010.95
  6. Step 6: Final answer
    x = 476.58

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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.