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Finding the Fourth Proportional to 555.38, 766.26 and 422.57

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Solution

The fourth proportional to 555.38, 766.26 and 422.57 is: 583.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.38 : 766.26 = 422.57 : x
  2. Step 2: Convert to fraction form
    555.38/766.26 = 422.57/x
  3. Step 3: Cross multiply
    555.38x = 766.26 × 422.57
  4. Step 4: Simplify right side
    555.38x = 323,798.49
  5. Step 5: Solve for x
    x = 323,798.49/555.38
  6. Step 6: Final answer
    x = 583.02

Related Problems

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Half scale
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Double scale
Find fourth proportional to 556.38, 767.64 and 423.57
Similar ratio
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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.