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Finding the Fourth Proportional to 1,018.81, 1,527.61 and 401.80

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Solution

The fourth proportional to 1,018.81, 1,527.61 and 401.80 is: 602.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,018.81 : 1,527.61 = 401.80 : x
  2. Step 2: Convert to fraction form
    1,018.81/1,527.61 = 401.80/x
  3. Step 3: Cross multiply
    1,018.81x = 1,527.61 × 401.80
  4. Step 4: Simplify right side
    1,018.81x = 613,793.70
  5. Step 5: Solve for x
    x = 613,793.70/1,018.81
  6. Step 6: Final answer
    x = 602.46

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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.