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Finding the Fourth Proportional to 710.12, 979.65 and 415.26

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Solution

The fourth proportional to 710.12, 979.65 and 415.26 is: 572.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.12 : 979.65 = 415.26 : x
  2. Step 2: Convert to fraction form
    710.12/979.65 = 415.26/x
  3. Step 3: Cross multiply
    710.12x = 979.65 × 415.26
  4. Step 4: Simplify right side
    710.12x = 406,809.46
  5. Step 5: Solve for x
    x = 406,809.46/710.12
  6. Step 6: Final answer
    x = 572.87

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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.