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Finding the Fourth Proportional to 663,776.40, 993,040.20 and 576,004.80

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Solution

The fourth proportional to 663,776.40, 993,040.20 and 576,004.80 is: 861,729.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,776.40 : 993,040.20 = 576,004.80 : x
  2. Step 2: Convert to fraction form
    663,776.40/993,040.20 = 576,004.80/x
  3. Step 3: Cross multiply
    663,776.40x = 993,040.20 × 576,004.80
  4. Step 4: Simplify right side
    663,776.40x = 571,995,921,792.96
  5. Step 5: Solve for x
    x = 571,995,921,792.96/663,776.40
  6. Step 6: Final answer
    x = 861,729.83

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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.