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Finding the Fourth Proportional to 710.18, 978.59 and 700.61

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Solution

The fourth proportional to 710.18, 978.59 and 700.61 is: 965.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.18 : 978.59 = 700.61 : x
  2. Step 2: Convert to fraction form
    710.18/978.59 = 700.61/x
  3. Step 3: Cross multiply
    710.18x = 978.59 × 700.61
  4. Step 4: Simplify right side
    710.18x = 685,606.44
  5. Step 5: Solve for x
    x = 685,606.44/710.18
  6. Step 6: Final answer
    x = 965.40

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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.