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Finding the Fourth Proportional to 627,298.34, 865,643.49 and 355,360.68

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Solution

The fourth proportional to 627,298.34, 865,643.49 and 355,360.68 is: 490,381.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,298.34 : 865,643.49 = 355,360.68 : x
  2. Step 2: Convert to fraction form
    627,298.34/865,643.49 = 355,360.68/x
  3. Step 3: Cross multiply
    627,298.34x = 865,643.49 × 355,360.68
  4. Step 4: Simplify right side
    627,298.34x = 307,615,659,243.97
  5. Step 5: Solve for x
    x = 307,615,659,243.97/627,298.34
  6. Step 6: Final answer
    x = 490,381.76

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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.