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Finding the Fourth Proportional to 688,456, 950,158.38 and 386,650

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Solution

The fourth proportional to 688,456, 950,158.38 and 386,650 is: 533,627.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,456 : 950,158.38 = 386,650 : x
  2. Step 2: Convert to fraction form
    688,456/950,158.38 = 386,650/x
  3. Step 3: Cross multiply
    688,456x = 950,158.38 × 386,650
  4. Step 4: Simplify right side
    688,456x = 367,378,737,627
  5. Step 5: Solve for x
    x = 367,378,737,627/688,456
  6. Step 6: Final answer
    x = 533,627.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.