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Finding the Fourth Proportional to 540.51, 811.41 and 425.32

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Solution

The fourth proportional to 540.51, 811.41 and 425.32 is: 638.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.51 : 811.41 = 425.32 : x
  2. Step 2: Convert to fraction form
    540.51/811.41 = 425.32/x
  3. Step 3: Cross multiply
    540.51x = 811.41 × 425.32
  4. Step 4: Simplify right side
    540.51x = 345,108.90
  5. Step 5: Solve for x
    x = 345,108.90/540.51
  6. Step 6: Final answer
    x = 638.49

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.