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Finding the Fourth Proportional to 641.56, 954.75 and 618.52

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Solution

The fourth proportional to 641.56, 954.75 and 618.52 is: 920.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.56 : 954.75 = 618.52 : x
  2. Step 2: Convert to fraction form
    641.56/954.75 = 618.52/x
  3. Step 3: Cross multiply
    641.56x = 954.75 × 618.52
  4. Step 4: Simplify right side
    641.56x = 590,531.97
  5. Step 5: Solve for x
    x = 590,531.97/641.56
  6. Step 6: Final answer
    x = 920.46

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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.