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Finding the Fourth Proportional to 638,754.34, 881,481.86 and 348,366.60

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Solution

The fourth proportional to 638,754.34, 881,481.86 and 348,366.60 is: 480,746.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,754.34 : 881,481.86 = 348,366.60 : x
  2. Step 2: Convert to fraction form
    638,754.34/881,481.86 = 348,366.60/x
  3. Step 3: Cross multiply
    638,754.34x = 881,481.86 × 348,366.60
  4. Step 4: Simplify right side
    638,754.34x = 307,078,836,788.04
  5. Step 5: Solve for x
    x = 307,078,836,788.04/638,754.34
  6. Step 6: Final answer
    x = 480,746.38

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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.