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Finding the Fourth Proportional to 393,107.88, 542,488.86 and 223,342.20

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Solution

The fourth proportional to 393,107.88, 542,488.86 and 223,342.20 is: 308,212.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,107.88 : 542,488.86 = 223,342.20 : x
  2. Step 2: Convert to fraction form
    393,107.88/542,488.86 = 223,342.20/x
  3. Step 3: Cross multiply
    393,107.88x = 542,488.86 × 223,342.20
  4. Step 4: Simplify right side
    393,107.88x = 121,160,655,467.89
  5. Step 5: Solve for x
    x = 121,160,655,467.89/393,107.88
  6. Step 6: Final answer
    x = 308,212.23

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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.