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Finding the Fourth Proportional to 402,729.44, 555,780.90 and 221,455.16

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Solution

The fourth proportional to 402,729.44, 555,780.90 and 221,455.16 is: 305,615.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,729.44 : 555,780.90 = 221,455.16 : x
  2. Step 2: Convert to fraction form
    402,729.44/555,780.90 = 221,455.16/x
  3. Step 3: Cross multiply
    402,729.44x = 555,780.90 × 221,455.16
  4. Step 4: Simplify right side
    402,729.44x = 123,080,548,134.44
  5. Step 5: Solve for x
    x = 123,080,548,134.44/402,729.44
  6. Step 6: Final answer
    x = 305,615.97

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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.