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Finding the Fourth Proportional to 342,309.70, 472,228.28 and 221,489.94

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Solution

The fourth proportional to 342,309.70, 472,228.28 and 221,489.94 is: 305,553.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,309.70 : 472,228.28 = 221,489.94 : x
  2. Step 2: Convert to fraction form
    342,309.70/472,228.28 = 221,489.94/x
  3. Step 3: Cross multiply
    342,309.70x = 472,228.28 × 221,489.94
  4. Step 4: Simplify right side
    342,309.70x = 104,593,814,897.50
  5. Step 5: Solve for x
    x = 104,593,814,897.50/342,309.70
  6. Step 6: Final answer
    x = 305,553.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.