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Finding the Fourth Proportional to 2,922.75, 4,384.13 and 870.75

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Solution

The fourth proportional to 2,922.75, 4,384.13 and 870.75 is: 1,306.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,922.75 : 4,384.13 = 870.75 : x
  2. Step 2: Convert to fraction form
    2,922.75/4,384.13 = 870.75/x
  3. Step 3: Cross multiply
    2,922.75x = 4,384.13 × 870.75
  4. Step 4: Simplify right side
    2,922.75x = 3,817,476.84
  5. Step 5: Solve for x
    x = 3,817,476.84/2,922.75
  6. Step 6: Final answer
    x = 1,306.13

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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.