Home / 1,319.53-1,977.47-1,280.11

Finding the Fourth Proportional to 1,319.53, 1,977.47 and 1,280.11

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Solution

The fourth proportional to 1,319.53, 1,977.47 and 1,280.11 is: 1,918.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319.53 : 1,977.47 = 1,280.11 : x
  2. Step 2: Convert to fraction form
    1,319.53/1,977.47 = 1,280.11/x
  3. Step 3: Cross multiply
    1,319.53x = 1,977.47 × 1,280.11
  4. Step 4: Simplify right side
    1,319.53x = 2,531,362.83
  5. Step 5: Solve for x
    x = 2,531,362.83/1,319.53
  6. Step 6: Final answer
    x = 1,918.39

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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.