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Finding the Fourth Proportional to 641.40, 962.10 and 617.10

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Solution

The fourth proportional to 641.40, 962.10 and 617.10 is: 925.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.40 : 962.10 = 617.10 : x
  2. Step 2: Convert to fraction form
    641.40/962.10 = 617.10/x
  3. Step 3: Cross multiply
    641.40x = 962.10 × 617.10
  4. Step 4: Simplify right side
    641.40x = 593,711.91
  5. Step 5: Solve for x
    x = 593,711.91/641.40
  6. Step 6: Final answer
    x = 925.65

Related Problems

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.