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Finding the Fourth Proportional to 515,423.40, 771,822.90 and 491,803.80

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Solution

The fourth proportional to 515,423.40, 771,822.90 and 491,803.80 is: 736,453.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,423.40 : 771,822.90 = 491,803.80 : x
  2. Step 2: Convert to fraction form
    515,423.40/771,822.90 = 491,803.80/x
  3. Step 3: Cross multiply
    515,423.40x = 771,822.90 × 491,803.80
  4. Step 4: Simplify right side
    515,423.40x = 379,585,435,147.02
  5. Step 5: Solve for x
    x = 379,585,435,147.02/515,423.40
  6. Step 6: Final answer
    x = 736,453.63

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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.