Home / 1,278.24-1,916.73-456.39

Finding the Fourth Proportional to 1,278.24, 1,916.73 and 456.39

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Solution

The fourth proportional to 1,278.24, 1,916.73 and 456.39 is: 684.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.24 : 1,916.73 = 456.39 : x
  2. Step 2: Convert to fraction form
    1,278.24/1,916.73 = 456.39/x
  3. Step 3: Cross multiply
    1,278.24x = 1,916.73 × 456.39
  4. Step 4: Simplify right side
    1,278.24x = 874,776.40
  5. Step 5: Solve for x
    x = 874,776.40/1,278.24
  6. Step 6: Final answer
    x = 684.36

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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.