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Finding the Fourth Proportional to 636,688.84, 878,755.26 and 364,938.76

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Solution

The fourth proportional to 636,688.84, 878,755.26 and 364,938.76 is: 503,686.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,688.84 : 878,755.26 = 364,938.76 : x
  2. Step 2: Convert to fraction form
    636,688.84/878,755.26 = 364,938.76/x
  3. Step 3: Cross multiply
    636,688.84x = 878,755.26 × 364,938.76
  4. Step 4: Simplify right side
    636,688.84x = 320,691,854,927.88
  5. Step 5: Solve for x
    x = 320,691,854,927.88/636,688.84
  6. Step 6: Final answer
    x = 503,686.94

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Double scale
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1.5x scale

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.