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Finding the Fourth Proportional to 715.10, 1,071.92 and 304.47

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Solution

The fourth proportional to 715.10, 1,071.92 and 304.47 is: 456.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.10 : 1,071.92 = 304.47 : x
  2. Step 2: Convert to fraction form
    715.10/1,071.92 = 304.47/x
  3. Step 3: Cross multiply
    715.10x = 1,071.92 × 304.47
  4. Step 4: Simplify right side
    715.10x = 326,368.24
  5. Step 5: Solve for x
    x = 326,368.24/715.10
  6. Step 6: Final answer
    x = 456.40

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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.