Home / 1,281.90-1,772.08-1,150.68

Finding the Fourth Proportional to 1,281.90, 1,772.08 and 1,150.68

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Solution

The fourth proportional to 1,281.90, 1,772.08 and 1,150.68 is: 1,590.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281.90 : 1,772.08 = 1,150.68 : x
  2. Step 2: Convert to fraction form
    1,281.90/1,772.08 = 1,150.68/x
  3. Step 3: Cross multiply
    1,281.90x = 1,772.08 × 1,150.68
  4. Step 4: Simplify right side
    1,281.90x = 2,039,097.01
  5. Step 5: Solve for x
    x = 2,039,097.01/1,281.90
  6. Step 6: Final answer
    x = 1,590.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.