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Finding the Fourth Proportional to 2,868.70, 4,303.65 and 921.10

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Solution

The fourth proportional to 2,868.70, 4,303.65 and 921.10 is: 1,381.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,868.70 : 4,303.65 = 921.10 : x
  2. Step 2: Convert to fraction form
    2,868.70/4,303.65 = 921.10/x
  3. Step 3: Cross multiply
    2,868.70x = 4,303.65 × 921.10
  4. Step 4: Simplify right side
    2,868.70x = 3,964,092.02
  5. Step 5: Solve for x
    x = 3,964,092.02/2,868.70
  6. Step 6: Final answer
    x = 1,381.84

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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.