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Finding the Fourth Proportional to 710.91, 1,066.10 and 300.15

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Solution

The fourth proportional to 710.91, 1,066.10 and 300.15 is: 450.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.91 : 1,066.10 = 300.15 : x
  2. Step 2: Convert to fraction form
    710.91/1,066.10 = 300.15/x
  3. Step 3: Cross multiply
    710.91x = 1,066.10 × 300.15
  4. Step 4: Simplify right side
    710.91x = 319,988.41
  5. Step 5: Solve for x
    x = 319,988.41/710.91
  6. Step 6: Final answer
    x = 450.11

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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.