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Finding the Fourth Proportional to 426,882.48, 640,172.70 and 187,112.76

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Solution

The fourth proportional to 426,882.48, 640,172.70 and 187,112.76 is: 280,602.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,882.48 : 640,172.70 = 187,112.76 : x
  2. Step 2: Convert to fraction form
    426,882.48/640,172.70 = 187,112.76/x
  3. Step 3: Cross multiply
    426,882.48x = 640,172.70 × 187,112.76
  4. Step 4: Simplify right side
    426,882.48x = 119,784,480,773.65
  5. Step 5: Solve for x
    x = 119,784,480,773.65/426,882.48
  6. Step 6: Final answer
    x = 280,602.94

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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.