Home / 2,215.64-3,323.84-916.40

Finding the Fourth Proportional to 2,215.64, 3,323.84 and 916.40

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Solution

The fourth proportional to 2,215.64, 3,323.84 and 916.40 is: 1,374.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.64 : 3,323.84 = 916.40 : x
  2. Step 2: Convert to fraction form
    2,215.64/3,323.84 = 916.40/x
  3. Step 3: Cross multiply
    2,215.64x = 3,323.84 × 916.40
  4. Step 4: Simplify right side
    2,215.64x = 3,045,966.98
  5. Step 5: Solve for x
    x = 3,045,966.98/2,215.64
  6. Step 6: Final answer
    x = 1,374.76

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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.