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Finding the Fourth Proportional to 627,309.60, 865,659.04 and 355,371.95

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Solution

The fourth proportional to 627,309.60, 865,659.04 and 355,371.95 is: 490,397.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,309.60 : 865,659.04 = 355,371.95 : x
  2. Step 2: Convert to fraction form
    627,309.60/865,659.04 = 355,371.95/x
  3. Step 3: Cross multiply
    627,309.60x = 865,659.04 × 355,371.95
  4. Step 4: Simplify right side
    627,309.60x = 307,630,941,079.93
  5. Step 5: Solve for x
    x = 307,630,941,079.93/627,309.60
  6. Step 6: Final answer
    x = 490,397.31

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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.