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Finding the Fourth Proportional to 1,272,644, 1,908,977.52 and 386,180

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Solution

The fourth proportional to 1,272,644, 1,908,977.52 and 386,180 is: 579,273.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272,644 : 1,908,977.52 = 386,180 : x
  2. Step 2: Convert to fraction form
    1,272,644/1,908,977.52 = 386,180/x
  3. Step 3: Cross multiply
    1,272,644x = 1,908,977.52 × 386,180
  4. Step 4: Simplify right side
    1,272,644x = 737,208,938,673.60
  5. Step 5: Solve for x
    x = 737,208,938,673.60/1,272,644
  6. Step 6: Final answer
    x = 579,273.50

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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.