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Finding the Fourth Proportional to 402,678.86, 555,700.62 and 221,392.04

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Solution

The fourth proportional to 402,678.86, 555,700.62 and 221,392.04 is: 305,523.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,678.86 : 555,700.62 = 221,392.04 : x
  2. Step 2: Convert to fraction form
    402,678.86/555,700.62 = 221,392.04/x
  3. Step 3: Cross multiply
    402,678.86x = 555,700.62 × 221,392.04
  4. Step 4: Simplify right side
    402,678.86x = 123,027,693,891.07
  5. Step 5: Solve for x
    x = 123,027,693,891.07/402,678.86
  6. Step 6: Final answer
    x = 305,523.10

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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.