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Finding the Fourth Proportional to 641,838.60, 885,750.78 and 351,462.40

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Solution

The fourth proportional to 641,838.60, 885,750.78 and 351,462.40 is: 485,025.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,838.60 : 885,750.78 = 351,462.40 : x
  2. Step 2: Convert to fraction form
    641,838.60/885,750.78 = 351,462.40/x
  3. Step 3: Cross multiply
    641,838.60x = 885,750.78 × 351,462.40
  4. Step 4: Simplify right side
    641,838.60x = 311,308,094,940.67
  5. Step 5: Solve for x
    x = 311,308,094,940.67/641,838.60
  6. Step 6: Final answer
    x = 485,025.51

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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.