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Finding the Fourth Proportional to 651.40, 977.36 and 266.92

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Solution

The fourth proportional to 651.40, 977.36 and 266.92 is: 400.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.40 : 977.36 = 266.92 : x
  2. Step 2: Convert to fraction form
    651.40/977.36 = 266.92/x
  3. Step 3: Cross multiply
    651.40x = 977.36 × 266.92
  4. Step 4: Simplify right side
    651.40x = 260,876.93
  5. Step 5: Solve for x
    x = 260,876.93/651.40
  6. Step 6: Final answer
    x = 400.49

Related Problems

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Double scale
Find fourth proportional to 652.40, 978.86 and 267.92
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.