Home / 402,721.43-555,769.85-221,447.16

Finding the Fourth Proportional to 402,721.43, 555,769.85 and 221,447.16

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Solution

The fourth proportional to 402,721.43, 555,769.85 and 221,447.16 is: 305,604.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,721.43 : 555,769.85 = 221,447.16 : x
  2. Step 2: Convert to fraction form
    402,721.43/555,769.85 = 221,447.16/x
  3. Step 3: Cross multiply
    402,721.43x = 555,769.85 × 221,447.16
  4. Step 4: Simplify right side
    402,721.43x = 123,073,653,788.89
  5. Step 5: Solve for x
    x = 123,073,653,788.89/402,721.43
  6. Step 6: Final answer
    x = 305,604.93

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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.