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Finding the Fourth Proportional to 627,258.90, 865,612.65 and 340,781.34

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Solution

The fourth proportional to 627,258.90, 865,612.65 and 340,781.34 is: 470,275.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,258.90 : 865,612.65 = 340,781.34 : x
  2. Step 2: Convert to fraction form
    627,258.90/865,612.65 = 340,781.34/x
  3. Step 3: Cross multiply
    627,258.90x = 865,612.65 × 340,781.34
  4. Step 4: Simplify right side
    627,258.90x = 294,984,638,787.95
  5. Step 5: Solve for x
    x = 294,984,638,787.95/627,258.90
  6. Step 6: Final answer
    x = 470,275.73

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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.