Home / 1,210.90-1,816.17-389.25

Finding the Fourth Proportional to 1,210.90, 1,816.17 and 389.25

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Solution

The fourth proportional to 1,210.90, 1,816.17 and 389.25 is: 583.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.90 : 1,816.17 = 389.25 : x
  2. Step 2: Convert to fraction form
    1,210.90/1,816.17 = 389.25/x
  3. Step 3: Cross multiply
    1,210.90x = 1,816.17 × 389.25
  4. Step 4: Simplify right side
    1,210.90x = 706,944.17
  5. Step 5: Solve for x
    x = 706,944.17/1,210.90
  6. Step 6: Final answer
    x = 583.82

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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.