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Finding the Fourth Proportional to 710, 979.08 and 578.60

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Solution

The fourth proportional to 710, 979.08 and 578.60 is: 797.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    710 : 979.08 = 578.60 : x
  2. Step 2: Convert to fraction form
    710/979.08 = 578.60/x
  3. Step 3: Cross multiply
    710x = 979.08 × 578.60
  4. Step 4: Simplify right side
    710x = 566,495.69
  5. Step 5: Solve for x
    x = 566,495.69/710
  6. Step 6: Final answer
    x = 797.88

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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.