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Finding the Fourth Proportional to 1,354.88, 1,870.26 and 1,000.20

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Solution

The fourth proportional to 1,354.88, 1,870.26 and 1,000.20 is: 1,380.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,354.88 : 1,870.26 = 1,000.20 : x
  2. Step 2: Convert to fraction form
    1,354.88/1,870.26 = 1,000.20/x
  3. Step 3: Cross multiply
    1,354.88x = 1,870.26 × 1,000.20
  4. Step 4: Simplify right side
    1,354.88x = 1,870,634.05
  5. Step 5: Solve for x
    x = 1,870,634.05/1,354.88
  6. Step 6: Final answer
    x = 1,380.66

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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.