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Finding the Fourth Proportional to 1,054.80, 1,581.86 and 361.35

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Solution

The fourth proportional to 1,054.80, 1,581.86 and 361.35 is: 541.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,054.80 : 1,581.86 = 361.35 : x
  2. Step 2: Convert to fraction form
    1,054.80/1,581.86 = 361.35/x
  3. Step 3: Cross multiply
    1,054.80x = 1,581.86 × 361.35
  4. Step 4: Simplify right side
    1,054.80x = 571,603.30
  5. Step 5: Solve for x
    x = 571,603.30/1,054.80
  6. Step 6: Final answer
    x = 541.91

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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.