Home / 639,778.10-959,206.35-359,381.30

Finding the Fourth Proportional to 639,778.10, 959,206.35 and 359,381.30

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Solution

The fourth proportional to 639,778.10, 959,206.35 and 359,381.30 is: 538,813.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,778.10 : 959,206.35 = 359,381.30 : x
  2. Step 2: Convert to fraction form
    639,778.10/959,206.35 = 359,381.30/x
  3. Step 3: Cross multiply
    639,778.10x = 959,206.35 × 359,381.30
  4. Step 4: Simplify right side
    639,778.10x = 344,720,825,031.26
  5. Step 5: Solve for x
    x = 344,720,825,031.26/639,778.10
  6. Step 6: Final answer
    x = 538,813.11

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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.