Home / 1,278.32-1,916.48-585.44

Finding the Fourth Proportional to 1,278.32, 1,916.48 and 585.44

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Solution

The fourth proportional to 1,278.32, 1,916.48 and 585.44 is: 877.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.32 : 1,916.48 = 585.44 : x
  2. Step 2: Convert to fraction form
    1,278.32/1,916.48 = 585.44/x
  3. Step 3: Cross multiply
    1,278.32x = 1,916.48 × 585.44
  4. Step 4: Simplify right side
    1,278.32x = 1,121,984.05
  5. Step 5: Solve for x
    x = 1,121,984.05/1,278.32
  6. Step 6: Final answer
    x = 877.70

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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.