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Finding the Fourth Proportional to 1,275.03, 1,909.26 and 1,069.07

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Solution

The fourth proportional to 1,275.03, 1,909.26 and 1,069.07 is: 1,600.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,275.03 : 1,909.26 = 1,069.07 : x
  2. Step 2: Convert to fraction form
    1,275.03/1,909.26 = 1,069.07/x
  3. Step 3: Cross multiply
    1,275.03x = 1,909.26 × 1,069.07
  4. Step 4: Simplify right side
    1,275.03x = 2,041,123.04
  5. Step 5: Solve for x
    x = 2,041,123.04/1,275.03
  6. Step 6: Final answer
    x = 1,600.84

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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.