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Finding the Fourth Proportional to 651.50, 977.18 and 261.49

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Solution

The fourth proportional to 651.50, 977.18 and 261.49 is: 392.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.50 : 977.18 = 261.49 : x
  2. Step 2: Convert to fraction form
    651.50/977.18 = 261.49/x
  3. Step 3: Cross multiply
    651.50x = 977.18 × 261.49
  4. Step 4: Simplify right side
    651.50x = 255,521.62
  5. Step 5: Solve for x
    x = 255,521.62/651.50
  6. Step 6: Final answer
    x = 392.20

Related Problems

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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.