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Finding the Fourth Proportional to 638,980.31, 881,778.65 and 352,500.32

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Solution

The fourth proportional to 638,980.31, 881,778.65 and 352,500.32 is: 486,442.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,980.31 : 881,778.65 = 352,500.32 : x
  2. Step 2: Convert to fraction form
    638,980.31/881,778.65 = 352,500.32/x
  3. Step 3: Cross multiply
    638,980.31x = 881,778.65 × 352,500.32
  4. Step 4: Simplify right side
    638,980.31x = 310,827,256,736.11
  5. Step 5: Solve for x
    x = 310,827,256,736.11/638,980.31
  6. Step 6: Final answer
    x = 486,442.62

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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.