Home / 1,278.60-1,916.82-1,047.48

Finding the Fourth Proportional to 1,278.60, 1,916.82 and 1,047.48

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Solution

The fourth proportional to 1,278.60, 1,916.82 and 1,047.48 is: 1,570.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.60 : 1,916.82 = 1,047.48 : x
  2. Step 2: Convert to fraction form
    1,278.60/1,916.82 = 1,047.48/x
  3. Step 3: Cross multiply
    1,278.60x = 1,916.82 × 1,047.48
  4. Step 4: Simplify right side
    1,278.60x = 2,007,830.61
  5. Step 5: Solve for x
    x = 2,007,830.61/1,278.60
  6. Step 6: Final answer
    x = 1,570.34

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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.