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Finding the Fourth Proportional to 1,394.71, 2,089.07 and 1,061.95

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Solution

The fourth proportional to 1,394.71, 2,089.07 and 1,061.95 is: 1,590.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.71 : 2,089.07 = 1,061.95 : x
  2. Step 2: Convert to fraction form
    1,394.71/2,089.07 = 1,061.95/x
  3. Step 3: Cross multiply
    1,394.71x = 2,089.07 × 1,061.95
  4. Step 4: Simplify right side
    1,394.71x = 2,218,487.89
  5. Step 5: Solve for x
    x = 2,218,487.89/1,394.71
  6. Step 6: Final answer
    x = 1,590.64

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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.