Home / 1,278.75-1,916.67-576.53

Finding the Fourth Proportional to 1,278.75, 1,916.67 and 576.53

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Solution

The fourth proportional to 1,278.75, 1,916.67 and 576.53 is: 864.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.75 : 1,916.67 = 576.53 : x
  2. Step 2: Convert to fraction form
    1,278.75/1,916.67 = 576.53/x
  3. Step 3: Cross multiply
    1,278.75x = 1,916.67 × 576.53
  4. Step 4: Simplify right side
    1,278.75x = 1,105,017.76
  5. Step 5: Solve for x
    x = 1,105,017.76/1,278.75
  6. Step 6: Final answer
    x = 864.14

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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.