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Finding the Fourth Proportional to 710.70, 980.42 and 612.29

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Solution

The fourth proportional to 710.70, 980.42 and 612.29 is: 844.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.70 : 980.42 = 612.29 : x
  2. Step 2: Convert to fraction form
    710.70/980.42 = 612.29/x
  3. Step 3: Cross multiply
    710.70x = 980.42 × 612.29
  4. Step 4: Simplify right side
    710.70x = 600,293.40
  5. Step 5: Solve for x
    x = 600,293.40/710.70
  6. Step 6: Final answer
    x = 844.65

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1.5x scale

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.