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Finding the Fourth Proportional to 626,077.91, 863,987.49 and 354,139.98

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Solution

The fourth proportional to 626,077.91, 863,987.49 and 354,139.98 is: 488,713.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,077.91 : 863,987.49 = 354,139.98 : x
  2. Step 2: Convert to fraction form
    626,077.91/863,987.49 = 354,139.98/x
  3. Step 3: Cross multiply
    626,077.91x = 863,987.49 × 354,139.98
  4. Step 4: Simplify right side
    626,077.91x = 305,972,512,428.85
  5. Step 5: Solve for x
    x = 305,972,512,428.85/626,077.91
  6. Step 6: Final answer
    x = 488,713.16

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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.