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Finding the Fourth Proportional to 3,145,291, 4,717,939.74 and 781,387

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Solution

The fourth proportional to 3,145,291, 4,717,939.74 and 781,387 is: 1,172,081.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145,291 : 4,717,939.74 = 781,387 : x
  2. Step 2: Convert to fraction form
    3,145,291/4,717,939.74 = 781,387/x
  3. Step 3: Cross multiply
    3,145,291x = 4,717,939.74 × 781,387
  4. Step 4: Simplify right side
    3,145,291x = 3,686,536,779,619.38
  5. Step 5: Solve for x
    x = 3,686,536,779,619.38/3,145,291
  6. Step 6: Final answer
    x = 1,172,081.30

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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.