Home / 1,288.20-1,934.10-802.20

Finding the Fourth Proportional to 1,288.20, 1,934.10 and 802.20

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Solution

The fourth proportional to 1,288.20, 1,934.10 and 802.20 is: 1,204.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288.20 : 1,934.10 = 802.20 : x
  2. Step 2: Convert to fraction form
    1,288.20/1,934.10 = 802.20/x
  3. Step 3: Cross multiply
    1,288.20x = 1,934.10 × 802.20
  4. Step 4: Simplify right side
    1,288.20x = 1,551,535.02
  5. Step 5: Solve for x
    x = 1,551,535.02/1,288.20
  6. Step 6: Final answer
    x = 1,204.42

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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.