Home / 1,210.14-1,815.45-388.62

Finding the Fourth Proportional to 1,210.14, 1,815.45 and 388.62

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Solution

The fourth proportional to 1,210.14, 1,815.45 and 388.62 is: 583.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.14 : 1,815.45 = 388.62 : x
  2. Step 2: Convert to fraction form
    1,210.14/1,815.45 = 388.62/x
  3. Step 3: Cross multiply
    1,210.14x = 1,815.45 × 388.62
  4. Step 4: Simplify right side
    1,210.14x = 705,520.18
  5. Step 5: Solve for x
    x = 705,520.18/1,210.14
  6. Step 6: Final answer
    x = 583.01

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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.