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Finding the Fourth Proportional to 486,039.60, 729,059.40 and 418,388.40

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Solution

The fourth proportional to 486,039.60, 729,059.40 and 418,388.40 is: 627,582.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,039.60 : 729,059.40 = 418,388.40 : x
  2. Step 2: Convert to fraction form
    486,039.60/729,059.40 = 418,388.40/x
  3. Step 3: Cross multiply
    486,039.60x = 729,059.40 × 418,388.40
  4. Step 4: Simplify right side
    486,039.60x = 305,029,995,870.96
  5. Step 5: Solve for x
    x = 305,029,995,870.96/486,039.60
  6. Step 6: Final answer
    x = 627,582.60

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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.