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Finding the Fourth Proportional to 639,246.30, 958,869.45 and 440,180.70

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Solution

The fourth proportional to 639,246.30, 958,869.45 and 440,180.70 is: 660,271.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,246.30 : 958,869.45 = 440,180.70 : x
  2. Step 2: Convert to fraction form
    639,246.30/958,869.45 = 440,180.70/x
  3. Step 3: Cross multiply
    639,246.30x = 958,869.45 × 440,180.70
  4. Step 4: Simplify right side
    639,246.30x = 422,075,825,709.62
  5. Step 5: Solve for x
    x = 422,075,825,709.62/639,246.30
  6. Step 6: Final answer
    x = 660,271.05

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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.