Home / 1,278.08-1,916.84-456.41

Finding the Fourth Proportional to 1,278.08, 1,916.84 and 456.41

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Solution

The fourth proportional to 1,278.08, 1,916.84 and 456.41 is: 684.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.08 : 1,916.84 = 456.41 : x
  2. Step 2: Convert to fraction form
    1,278.08/1,916.84 = 456.41/x
  3. Step 3: Cross multiply
    1,278.08x = 1,916.84 × 456.41
  4. Step 4: Simplify right side
    1,278.08x = 874,853.08
  5. Step 5: Solve for x
    x = 874,853.08/1,278.08
  6. Step 6: Final answer
    x = 684.51

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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.