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Finding the Fourth Proportional to 710.01, 979.43 and 513.18

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Solution

The fourth proportional to 710.01, 979.43 and 513.18 is: 707.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.01 : 979.43 = 513.18 : x
  2. Step 2: Convert to fraction form
    710.01/979.43 = 513.18/x
  3. Step 3: Cross multiply
    710.01x = 979.43 × 513.18
  4. Step 4: Simplify right side
    710.01x = 502,621.32
  5. Step 5: Solve for x
    x = 502,621.32/710.01
  6. Step 6: Final answer
    x = 707.91

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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.