Home / 1,210.10-1,815.27-388.08

Finding the Fourth Proportional to 1,210.10, 1,815.27 and 388.08

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Solution

The fourth proportional to 1,210.10, 1,815.27 and 388.08 is: 582.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.10 : 1,815.27 = 388.08 : x
  2. Step 2: Convert to fraction form
    1,210.10/1,815.27 = 388.08/x
  3. Step 3: Cross multiply
    1,210.10x = 1,815.27 × 388.08
  4. Step 4: Simplify right side
    1,210.10x = 704,469.98
  5. Step 5: Solve for x
    x = 704,469.98/1,210.10
  6. Step 6: Final answer
    x = 582.16

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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.