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Finding the Fourth Proportional to 660,414.60, 989,309.70 and 360,358.20

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Solution

The fourth proportional to 660,414.60, 989,309.70 and 360,358.20 is: 539,821.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,414.60 : 989,309.70 = 360,358.20 : x
  2. Step 2: Convert to fraction form
    660,414.60/989,309.70 = 360,358.20/x
  3. Step 3: Cross multiply
    660,414.60x = 989,309.70 × 360,358.20
  4. Step 4: Simplify right side
    660,414.60x = 356,505,862,734.54
  5. Step 5: Solve for x
    x = 356,505,862,734.54/660,414.60
  6. Step 6: Final answer
    x = 539,821.29

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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.