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Finding the Fourth Proportional to 688,455, 950,157 and 386,649

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Solution

The fourth proportional to 688,455, 950,157 and 386,649 is: 533,625.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,455 : 950,157 = 386,649 : x
  2. Step 2: Convert to fraction form
    688,455/950,157 = 386,649/x
  3. Step 3: Cross multiply
    688,455x = 950,157 × 386,649
  4. Step 4: Simplify right side
    688,455x = 367,377,253,893
  5. Step 5: Solve for x
    x = 367,377,253,893/688,455
  6. Step 6: Final answer
    x = 533,625.66

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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.