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Finding the Fourth Proportional to 1,339.32, 2,009 and 473.68

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Solution

The fourth proportional to 1,339.32, 2,009 and 473.68 is: 710.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,339.32 : 2,009 = 473.68 : x
  2. Step 2: Convert to fraction form
    1,339.32/2,009 = 473.68/x
  3. Step 3: Cross multiply
    1,339.32x = 2,009 × 473.68
  4. Step 4: Simplify right side
    1,339.32x = 951,623.12
  5. Step 5: Solve for x
    x = 951,623.12/1,339.32
  6. Step 6: Final answer
    x = 710.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.