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Finding the Fourth Proportional to 402,399.42, 555,311.04 and 221,123.04

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Solution

The fourth proportional to 402,399.42, 555,311.04 and 221,123.04 is: 305,149.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,399.42 : 555,311.04 = 221,123.04 : x
  2. Step 2: Convert to fraction form
    402,399.42/555,311.04 = 221,123.04/x
  3. Step 3: Cross multiply
    402,399.42x = 555,311.04 × 221,123.04
  4. Step 4: Simplify right side
    402,399.42x = 122,792,065,204.36
  5. Step 5: Solve for x
    x = 122,792,065,204.36/402,399.42
  6. Step 6: Final answer
    x = 305,149.71

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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.