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Finding the Fourth Proportional to 577,040.10, 865,560.15 and 519,959.40

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Solution

The fourth proportional to 577,040.10, 865,560.15 and 519,959.40 is: 779,939.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,040.10 : 865,560.15 = 519,959.40 : x
  2. Step 2: Convert to fraction form
    577,040.10/865,560.15 = 519,959.40/x
  3. Step 3: Cross multiply
    577,040.10x = 865,560.15 × 519,959.40
  4. Step 4: Simplify right side
    577,040.10x = 450,056,136,257.91
  5. Step 5: Solve for x
    x = 450,056,136,257.91/577,040.10
  6. Step 6: Final answer
    x = 779,939.10

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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.