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Finding the Fourth Proportional to 715.10, 1,072.66 and 304.14

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Solution

The fourth proportional to 715.10, 1,072.66 and 304.14 is: 456.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.10 : 1,072.66 = 304.14 : x
  2. Step 2: Convert to fraction form
    715.10/1,072.66 = 304.14/x
  3. Step 3: Cross multiply
    715.10x = 1,072.66 × 304.14
  4. Step 4: Simplify right side
    715.10x = 326,238.81
  5. Step 5: Solve for x
    x = 326,238.81/715.10
  6. Step 6: Final answer
    x = 456.21

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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.