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Finding the Fourth Proportional to 710.33, 979.48 and 521.35

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Solution

The fourth proportional to 710.33, 979.48 and 521.35 is: 718.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.33 : 979.48 = 521.35 : x
  2. Step 2: Convert to fraction form
    710.33/979.48 = 521.35/x
  3. Step 3: Cross multiply
    710.33x = 979.48 × 521.35
  4. Step 4: Simplify right side
    710.33x = 510,655.61
  5. Step 5: Solve for x
    x = 510,655.61/710.33
  6. Step 6: Final answer
    x = 718.90

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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.