Home / 1,473.20-2,209.08-857.12

Finding the Fourth Proportional to 1,473.20, 2,209.08 and 857.12

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Solution

The fourth proportional to 1,473.20, 2,209.08 and 857.12 is: 1,285.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,473.20 : 2,209.08 = 857.12 : x
  2. Step 2: Convert to fraction form
    1,473.20/2,209.08 = 857.12/x
  3. Step 3: Cross multiply
    1,473.20x = 2,209.08 × 857.12
  4. Step 4: Simplify right side
    1,473.20x = 1,893,446.65
  5. Step 5: Solve for x
    x = 1,893,446.65/1,473.20
  6. Step 6: Final answer
    x = 1,285.26

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1.5x scale

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.