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Finding the Fourth Proportional to 709.41, 980.16 and 561.17

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Solution

The fourth proportional to 709.41, 980.16 and 561.17 is: 775.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.41 : 980.16 = 561.17 : x
  2. Step 2: Convert to fraction form
    709.41/980.16 = 561.17/x
  3. Step 3: Cross multiply
    709.41x = 980.16 × 561.17
  4. Step 4: Simplify right side
    709.41x = 550,036.39
  5. Step 5: Solve for x
    x = 550,036.39/709.41
  6. Step 6: Final answer
    x = 775.34

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Double scale
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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.