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Finding the Fourth Proportional to 402,460.88, 555,369.16 and 221,168.91

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Solution

The fourth proportional to 402,460.88, 555,369.16 and 221,168.91 is: 305,198.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,460.88 : 555,369.16 = 221,168.91 : x
  2. Step 2: Convert to fraction form
    402,460.88/555,369.16 = 221,168.91/x
  3. Step 3: Cross multiply
    402,460.88x = 555,369.16 × 221,168.91
  4. Step 4: Simplify right side
    402,460.88x = 122,830,391,764.82
  5. Step 5: Solve for x
    x = 122,830,391,764.82/402,460.88
  6. Step 6: Final answer
    x = 305,198.34

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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.