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Finding the Fourth Proportional to 402,774.77, 555,843.45 and 221,500.49

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Solution

The fourth proportional to 402,774.77, 555,843.45 and 221,500.49 is: 305,678.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,774.77 : 555,843.45 = 221,500.49 : x
  2. Step 2: Convert to fraction form
    402,774.77/555,843.45 = 221,500.49/x
  3. Step 3: Cross multiply
    402,774.77x = 555,843.45 × 221,500.49
  4. Step 4: Simplify right side
    402,774.77x = 123,119,597,404.83
  5. Step 5: Solve for x
    x = 123,119,597,404.83/402,774.77
  6. Step 6: Final answer
    x = 305,678.52

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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.