Home / 402,728.92-555,751.69-221,439.58

Finding the Fourth Proportional to 402,728.92, 555,751.69 and 221,439.58

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Solution

The fourth proportional to 402,728.92, 555,751.69 and 221,439.58 is: 305,578.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,728.92 : 555,751.69 = 221,439.58 : x
  2. Step 2: Convert to fraction form
    402,728.92/555,751.69 = 221,439.58/x
  3. Step 3: Cross multiply
    402,728.92x = 555,751.69 × 221,439.58
  4. Step 4: Simplify right side
    402,728.92x = 123,065,420,817.89
  5. Step 5: Solve for x
    x = 123,065,420,817.89/402,728.92
  6. Step 6: Final answer
    x = 305,578.80

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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.