Home / 1,287.62-1,929.99-556.10

Finding the Fourth Proportional to 1,287.62, 1,929.99 and 556.10

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Solution

The fourth proportional to 1,287.62, 1,929.99 and 556.10 is: 833.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287.62 : 1,929.99 = 556.10 : x
  2. Step 2: Convert to fraction form
    1,287.62/1,929.99 = 556.10/x
  3. Step 3: Cross multiply
    1,287.62x = 1,929.99 × 556.10
  4. Step 4: Simplify right side
    1,287.62x = 1,073,267.44
  5. Step 5: Solve for x
    x = 1,073,267.44/1,287.62
  6. Step 6: Final answer
    x = 833.53

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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.