Home / 1,470.20-2,028.88-807.12

Finding the Fourth Proportional to 1,470.20, 2,028.88 and 807.12

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Solution

The fourth proportional to 1,470.20, 2,028.88 and 807.12 is: 1,113.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,470.20 : 2,028.88 = 807.12 : x
  2. Step 2: Convert to fraction form
    1,470.20/2,028.88 = 807.12/x
  3. Step 3: Cross multiply
    1,470.20x = 2,028.88 × 807.12
  4. Step 4: Simplify right side
    1,470.20x = 1,637,550.63
  5. Step 5: Solve for x
    x = 1,637,550.63/1,470.20
  6. Step 6: Final answer
    x = 1,113.83

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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.