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Finding the Fourth Proportional to 402,794.25, 555,860.13 and 221,507.43

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Solution

The fourth proportional to 402,794.25, 555,860.13 and 221,507.43 is: 305,682.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,794.25 : 555,860.13 = 221,507.43 : x
  2. Step 2: Convert to fraction form
    402,794.25/555,860.13 = 221,507.43/x
  3. Step 3: Cross multiply
    402,794.25x = 555,860.13 × 221,507.43
  4. Step 4: Simplify right side
    402,794.25x = 123,127,148,835.77
  5. Step 5: Solve for x
    x = 123,127,148,835.77/402,794.25
  6. Step 6: Final answer
    x = 305,682.49

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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.