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Finding the Fourth Proportional to 2,221.79, 3,332.69 and 578.34

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Solution

The fourth proportional to 2,221.79, 3,332.69 and 578.34 is: 867.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,221.79 : 3,332.69 = 578.34 : x
  2. Step 2: Convert to fraction form
    2,221.79/3,332.69 = 578.34/x
  3. Step 3: Cross multiply
    2,221.79x = 3,332.69 × 578.34
  4. Step 4: Simplify right side
    2,221.79x = 1,927,411.27
  5. Step 5: Solve for x
    x = 1,927,411.27/2,221.79
  6. Step 6: Final answer
    x = 867.50

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Double scale
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Similar ratio
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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.