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Finding the Fourth Proportional to 2,221.80, 3,332.70 and 578.21

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Solution

The fourth proportional to 2,221.80, 3,332.70 and 578.21 is: 867.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,221.80 : 3,332.70 = 578.21 : x
  2. Step 2: Convert to fraction form
    2,221.80/3,332.70 = 578.21/x
  3. Step 3: Cross multiply
    2,221.80x = 3,332.70 × 578.21
  4. Step 4: Simplify right side
    2,221.80x = 1,927,000.47
  5. Step 5: Solve for x
    x = 1,927,000.47/2,221.80
  6. Step 6: Final answer
    x = 867.32

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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.