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Finding the Fourth Proportional to 487,023.56, 672,520.10 and 306,049

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Solution

The fourth proportional to 487,023.56, 672,520.10 and 306,049 is: 422,616.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,023.56 : 672,520.10 = 306,049 : x
  2. Step 2: Convert to fraction form
    487,023.56/672,520.10 = 306,049/x
  3. Step 3: Cross multiply
    487,023.56x = 672,520.10 × 306,049
  4. Step 4: Simplify right side
    487,023.56x = 205,824,104,084.90
  5. Step 5: Solve for x
    x = 205,824,104,084.90/487,023.56
  6. Step 6: Final answer
    x = 422,616.32

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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.