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Finding the Fourth Proportional to 636,369.60, 878,173.20 and 345,972

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Solution

The fourth proportional to 636,369.60, 878,173.20 and 345,972 is: 477,432.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,369.60 : 878,173.20 = 345,972 : x
  2. Step 2: Convert to fraction form
    636,369.60/878,173.20 = 345,972/x
  3. Step 3: Cross multiply
    636,369.60x = 878,173.20 × 345,972
  4. Step 4: Simplify right side
    636,369.60x = 303,823,338,350.40
  5. Step 5: Solve for x
    x = 303,823,338,350.40/636,369.60
  6. Step 6: Final answer
    x = 477,432.20

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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.