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Finding the Fourth Proportional to 710.02, 979.59 and 415.25

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Solution

The fourth proportional to 710.02, 979.59 and 415.25 is: 572.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.02 : 979.59 = 415.25 : x
  2. Step 2: Convert to fraction form
    710.02/979.59 = 415.25/x
  3. Step 3: Cross multiply
    710.02x = 979.59 × 415.25
  4. Step 4: Simplify right side
    710.02x = 406,774.75
  5. Step 5: Solve for x
    x = 406,774.75/710.02
  6. Step 6: Final answer
    x = 572.91

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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.