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Finding the Fourth Proportional to 647,939.20, 971,908.80 and 579,704.80

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Solution

The fourth proportional to 647,939.20, 971,908.80 and 579,704.80 is: 869,557.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,939.20 : 971,908.80 = 579,704.80 : x
  2. Step 2: Convert to fraction form
    647,939.20/971,908.80 = 579,704.80/x
  3. Step 3: Cross multiply
    647,939.20x = 971,908.80 × 579,704.80
  4. Step 4: Simplify right side
    647,939.20x = 563,420,196,522.24
  5. Step 5: Solve for x
    x = 563,420,196,522.24/647,939.20
  6. Step 6: Final answer
    x = 869,557.20

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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.