Home / 1,214.08-1,821.18-520.84

Finding the Fourth Proportional to 1,214.08, 1,821.18 and 520.84

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Solution

The fourth proportional to 1,214.08, 1,821.18 and 520.84 is: 781.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214.08 : 1,821.18 = 520.84 : x
  2. Step 2: Convert to fraction form
    1,214.08/1,821.18 = 520.84/x
  3. Step 3: Cross multiply
    1,214.08x = 1,821.18 × 520.84
  4. Step 4: Simplify right side
    1,214.08x = 948,543.39
  5. Step 5: Solve for x
    x = 948,543.39/1,214.08
  6. Step 6: Final answer
    x = 781.29

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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.