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Finding the Fourth Proportional to 402,311.70, 555,190.32 and 221,035.26

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Solution

The fourth proportional to 402,311.70, 555,190.32 and 221,035.26 is: 305,028.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,311.70 : 555,190.32 = 221,035.26 : x
  2. Step 2: Convert to fraction form
    402,311.70/555,190.32 = 221,035.26/x
  3. Step 3: Cross multiply
    402,311.70x = 555,190.32 × 221,035.26
  4. Step 4: Simplify right side
    402,311.70x = 122,716,636,730.68
  5. Step 5: Solve for x
    x = 122,716,636,730.68/402,311.70
  6. Step 6: Final answer
    x = 305,028.75

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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.