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Finding the Fourth Proportional to 636,604.70, 878,877.80 and 422,035.40

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Solution

The fourth proportional to 636,604.70, 878,877.80 and 422,035.40 is: 582,649.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,604.70 : 878,877.80 = 422,035.40 : x
  2. Step 2: Convert to fraction form
    636,604.70/878,877.80 = 422,035.40/x
  3. Step 3: Cross multiply
    636,604.70x = 878,877.80 × 422,035.40
  4. Step 4: Simplify right side
    636,604.70x = 370,917,537,369.55
  5. Step 5: Solve for x
    x = 370,917,537,369.55/636,604.70
  6. Step 6: Final answer
    x = 582,649.70

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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.