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Finding the Fourth Proportional to 2,888.52, 4,330.95 and 1,221.78

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Solution

The fourth proportional to 2,888.52, 4,330.95 and 1,221.78 is: 1,831.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,888.52 : 4,330.95 = 1,221.78 : x
  2. Step 2: Convert to fraction form
    2,888.52/4,330.95 = 1,221.78/x
  3. Step 3: Cross multiply
    2,888.52x = 4,330.95 × 1,221.78
  4. Step 4: Simplify right side
    2,888.52x = 5,291,468.09
  5. Step 5: Solve for x
    x = 5,291,468.09/2,888.52
  6. Step 6: Final answer
    x = 1,831.90

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1.5x scale

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.