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Finding the Fourth Proportional to 644.03, 966.05 and 259.19

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Solution

The fourth proportional to 644.03, 966.05 and 259.19 is: 388.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.03 : 966.05 = 259.19 : x
  2. Step 2: Convert to fraction form
    644.03/966.05 = 259.19/x
  3. Step 3: Cross multiply
    644.03x = 966.05 × 259.19
  4. Step 4: Simplify right side
    644.03x = 250,389.20
  5. Step 5: Solve for x
    x = 250,389.20/644.03
  6. Step 6: Final answer
    x = 388.79

Related Problems

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Half scale
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Double scale
Find fourth proportional to 645.03, 967.55 and 260.19
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.