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Finding the Fourth Proportional to 393,165.38, 542,565.38 and 223,399.52

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Solution

The fourth proportional to 393,165.38, 542,565.38 and 223,399.52 is: 308,289.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,165.38 : 542,565.38 = 223,399.52 : x
  2. Step 2: Convert to fraction form
    393,165.38/542,565.38 = 223,399.52/x
  3. Step 3: Cross multiply
    393,165.38x = 542,565.38 × 223,399.52
  4. Step 4: Simplify right side
    393,165.38x = 121,208,845,460.62
  5. Step 5: Solve for x
    x = 121,208,845,460.62/393,165.38
  6. Step 6: Final answer
    x = 308,289.72

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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.