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Finding the Fourth Proportional to 641.79, 962.69 and 384.75

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Solution

The fourth proportional to 641.79, 962.69 and 384.75 is: 577.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.79 : 962.69 = 384.75 : x
  2. Step 2: Convert to fraction form
    641.79/962.69 = 384.75/x
  3. Step 3: Cross multiply
    641.79x = 962.69 × 384.75
  4. Step 4: Simplify right side
    641.79x = 370,393.05
  5. Step 5: Solve for x
    x = 370,393.05/641.79
  6. Step 6: Final answer
    x = 577.13

Related Problems

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Half scale
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Double scale
Find fourth proportional to 642.79, 964.19 and 385.75
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.