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Finding the Fourth Proportional to 636,811.40, 878,793.42 and 350,331.80

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Solution

The fourth proportional to 636,811.40, 878,793.42 and 350,331.80 is: 483,454.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,811.40 : 878,793.42 = 350,331.80 : x
  2. Step 2: Convert to fraction form
    636,811.40/878,793.42 = 350,331.80/x
  3. Step 3: Cross multiply
    636,811.40x = 878,793.42 × 350,331.80
  4. Step 4: Simplify right side
    636,811.40x = 307,869,280,656.76
  5. Step 5: Solve for x
    x = 307,869,280,656.76/636,811.40
  6. Step 6: Final answer
    x = 483,454.41

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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.