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Finding the Fourth Proportional to 640,520.70, 883,828.26 and 364,885.80

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Solution

The fourth proportional to 640,520.70, 883,828.26 and 364,885.80 is: 503,490.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,520.70 : 883,828.26 = 364,885.80 : x
  2. Step 2: Convert to fraction form
    640,520.70/883,828.26 = 364,885.80/x
  3. Step 3: Cross multiply
    640,520.70x = 883,828.26 × 364,885.80
  4. Step 4: Simplify right side
    640,520.70x = 322,496,381,712.71
  5. Step 5: Solve for x
    x = 322,496,381,712.71/640,520.70
  6. Step 6: Final answer
    x = 503,490.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.