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Finding the Fourth Proportional to 627,405.76, 865,749.68 and 355,415.41

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Solution

The fourth proportional to 627,405.76, 865,749.68 and 355,415.41 is: 490,433.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,405.76 : 865,749.68 = 355,415.41 : x
  2. Step 2: Convert to fraction form
    627,405.76/865,749.68 = 355,415.41/x
  3. Step 3: Cross multiply
    627,405.76x = 865,749.68 × 355,415.41
  4. Step 4: Simplify right side
    627,405.76x = 307,700,778,112.49
  5. Step 5: Solve for x
    x = 307,700,778,112.49/627,405.76
  6. Step 6: Final answer
    x = 490,433.46

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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.