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Finding the Fourth Proportional to 577,921.40, 865,715.70 and 328,311.80

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Solution

The fourth proportional to 577,921.40, 865,715.70 and 328,311.80 is: 491,805.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,921.40 : 865,715.70 = 328,311.80 : x
  2. Step 2: Convert to fraction form
    577,921.40/865,715.70 = 328,311.80/x
  3. Step 3: Cross multiply
    577,921.40x = 865,715.70 × 328,311.80
  4. Step 4: Simplify right side
    577,921.40x = 284,224,679,755.26
  5. Step 5: Solve for x
    x = 284,224,679,755.26/577,921.40
  6. Step 6: Final answer
    x = 491,805.08

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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.