Home / 1,470.20-2,028.87-807.05

Finding the Fourth Proportional to 1,470.20, 2,028.87 and 807.05

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Solution

The fourth proportional to 1,470.20, 2,028.87 and 807.05 is: 1,113.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,470.20 : 2,028.87 = 807.05 : x
  2. Step 2: Convert to fraction form
    1,470.20/2,028.87 = 807.05/x
  3. Step 3: Cross multiply
    1,470.20x = 2,028.87 × 807.05
  4. Step 4: Simplify right side
    1,470.20x = 1,637,390.92
  5. Step 5: Solve for x
    x = 1,637,390.92/1,470.20
  6. Step 6: Final answer
    x = 1,113.72

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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.