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Finding the Fourth Proportional to 660,062.40, 989,863.20 and 344,414.40

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Solution

The fourth proportional to 660,062.40, 989,863.20 and 344,414.40 is: 516,501.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,062.40 : 989,863.20 = 344,414.40 : x
  2. Step 2: Convert to fraction form
    660,062.40/989,863.20 = 344,414.40/x
  3. Step 3: Cross multiply
    660,062.40x = 989,863.20 × 344,414.40
  4. Step 4: Simplify right side
    660,062.40x = 340,923,140,110.08
  5. Step 5: Solve for x
    x = 340,923,140,110.08/660,062.40
  6. Step 6: Final answer
    x = 516,501.38

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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.