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Finding the Fourth Proportional to 2,890.21, 4,335.84 and 916.33

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Solution

The fourth proportional to 2,890.21, 4,335.84 and 916.33 is: 1,374.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,890.21 : 4,335.84 = 916.33 : x
  2. Step 2: Convert to fraction form
    2,890.21/4,335.84 = 916.33/x
  3. Step 3: Cross multiply
    2,890.21x = 4,335.84 × 916.33
  4. Step 4: Simplify right side
    2,890.21x = 3,973,060.27
  5. Step 5: Solve for x
    x = 3,973,060.27/2,890.21
  6. Step 6: Final answer
    x = 1,374.66

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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.