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Finding the Fourth Proportional to 636,406.86, 878,244.75 and 349,945.50

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Solution

The fourth proportional to 636,406.86, 878,244.75 and 349,945.50 is: 482,926.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,406.86 : 878,244.75 = 349,945.50 : x
  2. Step 2: Convert to fraction form
    636,406.86/878,244.75 = 349,945.50/x
  3. Step 3: Cross multiply
    636,406.86x = 878,244.75 × 349,945.50
  4. Step 4: Simplify right side
    636,406.86x = 307,337,798,161.13
  5. Step 5: Solve for x
    x = 307,337,798,161.13/636,406.86
  6. Step 6: Final answer
    x = 482,926.60

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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.