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Finding the Fourth Proportional to 402,755.88, 555,838.50 and 221,499.72

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Solution

The fourth proportional to 402,755.88, 555,838.50 and 221,499.72 is: 305,689.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,755.88 : 555,838.50 = 221,499.72 : x
  2. Step 2: Convert to fraction form
    402,755.88/555,838.50 = 221,499.72/x
  3. Step 3: Cross multiply
    402,755.88x = 555,838.50 × 221,499.72
  4. Step 4: Simplify right side
    402,755.88x = 123,118,072,115.22
  5. Step 5: Solve for x
    x = 123,118,072,115.22/402,755.88
  6. Step 6: Final answer
    x = 305,689.07

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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.