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Finding the Fourth Proportional to 402,449.63, 555,369.30 and 221,161.51

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Solution

The fourth proportional to 402,449.63, 555,369.30 and 221,161.51 is: 305,196.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,449.63 : 555,369.30 = 221,161.51 : x
  2. Step 2: Convert to fraction form
    402,449.63/555,369.30 = 221,161.51/x
  3. Step 3: Cross multiply
    402,449.63x = 555,369.30 × 221,161.51
  4. Step 4: Simplify right side
    402,449.63x = 122,826,311,607.22
  5. Step 5: Solve for x
    x = 122,826,311,607.22/402,449.63
  6. Step 6: Final answer
    x = 305,196.73

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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.