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Finding the Fourth Proportional to 626,077.70, 863,987.14 and 354,139.74

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Solution

The fourth proportional to 626,077.70, 863,987.14 and 354,139.74 is: 488,712.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,077.70 : 863,987.14 = 354,139.74 : x
  2. Step 2: Convert to fraction form
    626,077.70/863,987.14 = 354,139.74/x
  3. Step 3: Cross multiply
    626,077.70x = 863,987.14 × 354,139.74
  4. Step 4: Simplify right side
    626,077.70x = 305,972,181,122.94
  5. Step 5: Solve for x
    x = 305,972,181,122.94/626,077.70
  6. Step 6: Final answer
    x = 488,712.79

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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.