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Finding the Fourth Proportional to 636,671.50, 878,731.49 and 364,921.57

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Solution

The fourth proportional to 636,671.50, 878,731.49 and 364,921.57 is: 503,663.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,671.50 : 878,731.49 = 364,921.57 : x
  2. Step 2: Convert to fraction form
    636,671.50/878,731.49 = 364,921.57/x
  3. Step 3: Cross multiply
    636,671.50x = 878,731.49 × 364,921.57
  4. Step 4: Simplify right side
    636,671.50x = 320,668,074,939.24
  5. Step 5: Solve for x
    x = 320,668,074,939.24/636,671.50
  6. Step 6: Final answer
    x = 503,663.31

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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.