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Finding the Fourth Proportional to 426,960.98, 640,663.01 and 190,248.61

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Solution

The fourth proportional to 426,960.98, 640,663.01 and 190,248.61 is: 285,471.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,960.98 : 640,663.01 = 190,248.61 : x
  2. Step 2: Convert to fraction form
    426,960.98/640,663.01 = 190,248.61/x
  3. Step 3: Cross multiply
    426,960.98x = 640,663.01 × 190,248.61
  4. Step 4: Simplify right side
    426,960.98x = 121,885,247,130.92
  5. Step 5: Solve for x
    x = 121,885,247,130.92/426,960.98
  6. Step 6: Final answer
    x = 285,471.63

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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.