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Finding the Fourth Proportional to 660,422.70, 990,634.05 and 344,806.20

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Solution

The fourth proportional to 660,422.70, 990,634.05 and 344,806.20 is: 517,209.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,422.70 : 990,634.05 = 344,806.20 : x
  2. Step 2: Convert to fraction form
    660,422.70/990,634.05 = 344,806.20/x
  3. Step 3: Cross multiply
    660,422.70x = 990,634.05 × 344,806.20
  4. Step 4: Simplify right side
    660,422.70x = 341,576,762,371.11
  5. Step 5: Solve for x
    x = 341,576,762,371.11/660,422.70
  6. Step 6: Final answer
    x = 517,209.30

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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.