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Finding the Fourth Proportional to 1,059, 1,588.56 and 400.81

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Solution

The fourth proportional to 1,059, 1,588.56 and 400.81 is: 601.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,059 : 1,588.56 = 400.81 : x
  2. Step 2: Convert to fraction form
    1,059/1,588.56 = 400.81/x
  3. Step 3: Cross multiply
    1,059x = 1,588.56 × 400.81
  4. Step 4: Simplify right side
    1,059x = 636,708.73
  5. Step 5: Solve for x
    x = 636,708.73/1,059
  6. Step 6: Final answer
    x = 601.24

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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.