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Finding the Fourth Proportional to 641.45, 955.61 and 610.49

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Solution

The fourth proportional to 641.45, 955.61 and 610.49 is: 909.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.45 : 955.61 = 610.49 : x
  2. Step 2: Convert to fraction form
    641.45/955.61 = 610.49/x
  3. Step 3: Cross multiply
    641.45x = 955.61 × 610.49
  4. Step 4: Simplify right side
    641.45x = 583,382.52
  5. Step 5: Solve for x
    x = 583,382.52/641.45
  6. Step 6: Final answer
    x = 909.48

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.