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Finding the Fourth Proportional to 1,288,844.40, 1,931,423.40 and 949,234.80

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Solution

The fourth proportional to 1,288,844.40, 1,931,423.40 and 949,234.80 is: 1,422,494.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,844.40 : 1,931,423.40 = 949,234.80 : x
  2. Step 2: Convert to fraction form
    1,288,844.40/1,931,423.40 = 949,234.80/x
  3. Step 3: Cross multiply
    1,288,844.40x = 1,931,423.40 × 949,234.80
  4. Step 4: Simplify right side
    1,288,844.40x = 1,833,374,304,814.32
  5. Step 5: Solve for x
    x = 1,833,374,304,814.32/1,288,844.40
  6. Step 6: Final answer
    x = 1,422,494.68

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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.