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Finding the Fourth Proportional to 639,040.90, 957,394.95 and 520,068.10

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Solution

The fourth proportional to 639,040.90, 957,394.95 and 520,068.10 is: 779,152.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,040.90 : 957,394.95 = 520,068.10 : x
  2. Step 2: Convert to fraction form
    639,040.90/957,394.95 = 520,068.10/x
  3. Step 3: Cross multiply
    639,040.90x = 957,394.95 × 520,068.10
  4. Step 4: Simplify right side
    639,040.90x = 497,910,572,596.10
  5. Step 5: Solve for x
    x = 497,910,572,596.10/639,040.90
  6. Step 6: Final answer
    x = 779,152.90

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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.