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Finding the Fourth Proportional to 1,278,752.40, 1,919,165.40 and 1,237,280.40

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Solution

The fourth proportional to 1,278,752.40, 1,919,165.40 and 1,237,280.40 is: 1,856,923.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,752.40 : 1,919,165.40 = 1,237,280.40 : x
  2. Step 2: Convert to fraction form
    1,278,752.40/1,919,165.40 = 1,237,280.40/x
  3. Step 3: Cross multiply
    1,278,752.40x = 1,919,165.40 × 1,237,280.40
  4. Step 4: Simplify right side
    1,278,752.40x = 2,374,545,733,778.16
  5. Step 5: Solve for x
    x = 2,374,545,733,778.16/1,278,752.40
  6. Step 6: Final answer
    x = 1,856,923.77

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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.