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Finding the Fourth Proportional to 423,230.89, 634,856.20 and 103,385.47

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Solution

The fourth proportional to 423,230.89, 634,856.20 and 103,385.47 is: 155,080.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,230.89 : 634,856.20 = 103,385.47 : x
  2. Step 2: Convert to fraction form
    423,230.89/634,856.20 = 103,385.47/x
  3. Step 3: Cross multiply
    423,230.89x = 634,856.20 × 103,385.47
  4. Step 4: Simplify right side
    423,230.89x = 65,634,906,628.62
  5. Step 5: Solve for x
    x = 65,634,906,628.62/423,230.89
  6. Step 6: Final answer
    x = 155,080.62

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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.