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Finding the Fourth Proportional to 401.19, 553.60 and 253.77

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Solution

The fourth proportional to 401.19, 553.60 and 253.77 is: 350.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.19 : 553.60 = 253.77 : x
  2. Step 2: Convert to fraction form
    401.19/553.60 = 253.77/x
  3. Step 3: Cross multiply
    401.19x = 553.60 × 253.77
  4. Step 4: Simplify right side
    401.19x = 140,487.07
  5. Step 5: Solve for x
    x = 140,487.07/401.19
  6. Step 6: Final answer
    x = 350.18

Related Problems

Find fourth proportional to 200.60, 276.80 and 126.89
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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.