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Finding the Fourth Proportional to 393,079.96, 542,464.88 and 223,342.84

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Solution

The fourth proportional to 393,079.96, 542,464.88 and 223,342.84 is: 308,221.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,079.96 : 542,464.88 = 223,342.84 : x
  2. Step 2: Convert to fraction form
    393,079.96/542,464.88 = 223,342.84/x
  3. Step 3: Cross multiply
    393,079.96x = 542,464.88 × 223,342.84
  4. Step 4: Simplify right side
    393,079.96x = 121,155,646,899.46
  5. Step 5: Solve for x
    x = 121,155,646,899.46/393,079.96
  6. Step 6: Final answer
    x = 308,221.38

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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.