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Finding the Fourth Proportional to 864.25, 1,192.82 and 510.15

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Solution

The fourth proportional to 864.25, 1,192.82 and 510.15 is: 704.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    864.25 : 1,192.82 = 510.15 : x
  2. Step 2: Convert to fraction form
    864.25/1,192.82 = 510.15/x
  3. Step 3: Cross multiply
    864.25x = 1,192.82 × 510.15
  4. Step 4: Simplify right side
    864.25x = 608,519.05
  5. Step 5: Solve for x
    x = 608,519.05/864.25
  6. Step 6: Final answer
    x = 704.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.