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Finding the Fourth Proportional to 626,729.90, 865,134.15 and 422,901.50

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Solution

The fourth proportional to 626,729.90, 865,134.15 and 422,901.50 is: 583,770.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,729.90 : 865,134.15 = 422,901.50 : x
  2. Step 2: Convert to fraction form
    626,729.90/865,134.15 = 422,901.50/x
  3. Step 3: Cross multiply
    626,729.90x = 865,134.15 × 422,901.50
  4. Step 4: Simplify right side
    626,729.90x = 365,866,529,736.23
  5. Step 5: Solve for x
    x = 365,866,529,736.23/626,729.90
  6. Step 6: Final answer
    x = 583,770.66

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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.