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Finding the Fourth Proportional to 2,868.68, 4,303.17 and 920.90

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Solution

The fourth proportional to 2,868.68, 4,303.17 and 920.90 is: 1,381.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,868.68 : 4,303.17 = 920.90 : x
  2. Step 2: Convert to fraction form
    2,868.68/4,303.17 = 920.90/x
  3. Step 3: Cross multiply
    2,868.68x = 4,303.17 × 920.90
  4. Step 4: Simplify right side
    2,868.68x = 3,962,789.25
  5. Step 5: Solve for x
    x = 3,962,789.25/2,868.68
  6. Step 6: Final answer
    x = 1,381.40

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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.