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Finding the Fourth Proportional to 487,760.85, 672,815.30 and 322,189.83

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Solution

The fourth proportional to 487,760.85, 672,815.30 and 322,189.83 is: 444,427.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,760.85 : 672,815.30 = 322,189.83 : x
  2. Step 2: Convert to fraction form
    487,760.85/672,815.30 = 322,189.83/x
  3. Step 3: Cross multiply
    487,760.85x = 672,815.30 × 322,189.83
  4. Step 4: Simplify right side
    487,760.85x = 216,774,245,517.45
  5. Step 5: Solve for x
    x = 216,774,245,517.45/487,760.85
  6. Step 6: Final answer
    x = 444,427.32

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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.