Home / 1,214.17-1,821.42-392.25

Finding the Fourth Proportional to 1,214.17, 1,821.42 and 392.25

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Solution

The fourth proportional to 1,214.17, 1,821.42 and 392.25 is: 588.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214.17 : 1,821.42 = 392.25 : x
  2. Step 2: Convert to fraction form
    1,214.17/1,821.42 = 392.25/x
  3. Step 3: Cross multiply
    1,214.17x = 1,821.42 × 392.25
  4. Step 4: Simplify right side
    1,214.17x = 714,445.16
  5. Step 5: Solve for x
    x = 714,445.16/1,214.17
  6. Step 6: Final answer
    x = 588.42

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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.