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Finding the Fourth Proportional to 987,756.60, 1,481,699.70 and 277,807.80

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Solution

The fourth proportional to 987,756.60, 1,481,699.70 and 277,807.80 is: 416,729.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    987,756.60 : 1,481,699.70 = 277,807.80 : x
  2. Step 2: Convert to fraction form
    987,756.60/1,481,699.70 = 277,807.80/x
  3. Step 3: Cross multiply
    987,756.60x = 1,481,699.70 × 277,807.80
  4. Step 4: Simplify right side
    987,756.60x = 411,627,733,917.66
  5. Step 5: Solve for x
    x = 411,627,733,917.66/987,756.60
  6. Step 6: Final answer
    x = 416,729.93

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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.