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Finding the Fourth Proportional to 353,403.73, 487,652.70 and 238,931.56

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Solution

The fourth proportional to 353,403.73, 487,652.70 and 238,931.56 is: 329,695.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,403.73 : 487,652.70 = 238,931.56 : x
  2. Step 2: Convert to fraction form
    353,403.73/487,652.70 = 238,931.56/x
  3. Step 3: Cross multiply
    353,403.73x = 487,652.70 × 238,931.56
  4. Step 4: Simplify right side
    353,403.73x = 116,515,620,349.21
  5. Step 5: Solve for x
    x = 116,515,620,349.21/353,403.73
  6. Step 6: Final answer
    x = 329,695.50

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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.