Home / 2,869.18-4,303.92-921.40

Finding the Fourth Proportional to 2,869.18, 4,303.92 and 921.40

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Solution

The fourth proportional to 2,869.18, 4,303.92 and 921.40 is: 1,382.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,869.18 : 4,303.92 = 921.40 : x
  2. Step 2: Convert to fraction form
    2,869.18/4,303.92 = 921.40/x
  3. Step 3: Cross multiply
    2,869.18x = 4,303.92 × 921.40
  4. Step 4: Simplify right side
    2,869.18x = 3,965,631.89
  5. Step 5: Solve for x
    x = 3,965,631.89/2,869.18
  6. Step 6: Final answer
    x = 1,382.15

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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.