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Finding the Fourth Proportional to 422,985.70, 634,330.98 and 170,200.69

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Solution

The fourth proportional to 422,985.70, 634,330.98 and 170,200.69 is: 255,241.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,985.70 : 634,330.98 = 170,200.69 : x
  2. Step 2: Convert to fraction form
    422,985.70/634,330.98 = 170,200.69/x
  3. Step 3: Cross multiply
    422,985.70x = 634,330.98 × 170,200.69
  4. Step 4: Simplify right side
    422,985.70x = 107,963,570,484.38
  5. Step 5: Solve for x
    x = 107,963,570,484.38/422,985.70
  6. Step 6: Final answer
    x = 255,241.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.