Home / 2,801.60-3,864.91-1,807.20

Finding the Fourth Proportional to 2,801.60, 3,864.91 and 1,807.20

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Solution

The fourth proportional to 2,801.60, 3,864.91 and 1,807.20 is: 2,493.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,801.60 : 3,864.91 = 1,807.20 : x
  2. Step 2: Convert to fraction form
    2,801.60/3,864.91 = 1,807.20/x
  3. Step 3: Cross multiply
    2,801.60x = 3,864.91 × 1,807.20
  4. Step 4: Simplify right side
    2,801.60x = 6,984,668.46
  5. Step 5: Solve for x
    x = 6,984,668.46/2,801.60
  6. Step 6: Final answer
    x = 2,493.10

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1.5x scale

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.