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Finding the Fourth Proportional to 404,421.12, 558,102.96 and 223,138.32

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Solution

The fourth proportional to 404,421.12, 558,102.96 and 223,138.32 is: 307,931.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,421.12 : 558,102.96 = 223,138.32 : x
  2. Step 2: Convert to fraction form
    404,421.12/558,102.96 = 223,138.32/x
  3. Step 3: Cross multiply
    404,421.12x = 558,102.96 × 223,138.32
  4. Step 4: Simplify right side
    404,421.12x = 124,534,156,881.43
  5. Step 5: Solve for x
    x = 124,534,156,881.43/404,421.12
  6. Step 6: Final answer
    x = 307,931.88

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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.