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Finding the Fourth Proportional to 508.19, 701.36 and 287.21

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Solution

The fourth proportional to 508.19, 701.36 and 287.21 is: 396.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.19 : 701.36 = 287.21 : x
  2. Step 2: Convert to fraction form
    508.19/701.36 = 287.21/x
  3. Step 3: Cross multiply
    508.19x = 701.36 × 287.21
  4. Step 4: Simplify right side
    508.19x = 201,439.00
  5. Step 5: Solve for x
    x = 201,439.00/508.19
  6. Step 6: Final answer
    x = 396.38

Related Problems

Find fourth proportional to 254.10, 350.68 and 143.61
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.