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Finding the Fourth Proportional to 638,481.59, 881,078.04 and 348,086.87

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Solution

The fourth proportional to 638,481.59, 881,078.04 and 348,086.87 is: 480,345.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,481.59 : 881,078.04 = 348,086.87 : x
  2. Step 2: Convert to fraction form
    638,481.59/881,078.04 = 348,086.87/x
  3. Step 3: Cross multiply
    638,481.59x = 881,078.04 × 348,086.87
  4. Step 4: Simplify right side
    638,481.59x = 306,691,697,169.34
  5. Step 5: Solve for x
    x = 306,691,697,169.34/638,481.59
  6. Step 6: Final answer
    x = 480,345.40

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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.