Home / 1,280.74-1,921.18-549.82

Finding the Fourth Proportional to 1,280.74, 1,921.18 and 549.82

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Solution

The fourth proportional to 1,280.74, 1,921.18 and 549.82 is: 824.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280.74 : 1,921.18 = 549.82 : x
  2. Step 2: Convert to fraction form
    1,280.74/1,921.18 = 549.82/x
  3. Step 3: Cross multiply
    1,280.74x = 1,921.18 × 549.82
  4. Step 4: Simplify right side
    1,280.74x = 1,056,303.19
  5. Step 5: Solve for x
    x = 1,056,303.19/1,280.74
  6. Step 6: Final answer
    x = 824.76

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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.