Home / 393,071.12-542,440.20-223,314.96

Finding the Fourth Proportional to 393,071.12, 542,440.20 and 223,314.96

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Solution

The fourth proportional to 393,071.12, 542,440.20 and 223,314.96 is: 308,175.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,071.12 : 542,440.20 = 223,314.96 : x
  2. Step 2: Convert to fraction form
    393,071.12/542,440.20 = 223,314.96/x
  3. Step 3: Cross multiply
    393,071.12x = 542,440.20 × 223,314.96
  4. Step 4: Simplify right side
    393,071.12x = 121,135,011,565.39
  5. Step 5: Solve for x
    x = 121,135,011,565.39/393,071.12
  6. Step 6: Final answer
    x = 308,175.81

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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.