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Finding the Fourth Proportional to 533,261.40, 799,892.10 and 391,543.80

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Solution

The fourth proportional to 533,261.40, 799,892.10 and 391,543.80 is: 587,315.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    533,261.40 : 799,892.10 = 391,543.80 : x
  2. Step 2: Convert to fraction form
    533,261.40/799,892.10 = 391,543.80/x
  3. Step 3: Cross multiply
    533,261.40x = 799,892.10 × 391,543.80
  4. Step 4: Simplify right side
    533,261.40x = 313,192,792,423.98
  5. Step 5: Solve for x
    x = 313,192,792,423.98/533,261.40
  6. Step 6: Final answer
    x = 587,315.70

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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.