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Finding the Fourth Proportional to 551.39, 761.20 and 426.77

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Solution

The fourth proportional to 551.39, 761.20 and 426.77 is: 589.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.39 : 761.20 = 426.77 : x
  2. Step 2: Convert to fraction form
    551.39/761.20 = 426.77/x
  3. Step 3: Cross multiply
    551.39x = 761.20 × 426.77
  4. Step 4: Simplify right side
    551.39x = 324,852.45
  5. Step 5: Solve for x
    x = 324,852.45/551.39
  6. Step 6: Final answer
    x = 589.16

Related Problems

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.