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Finding the Fourth Proportional to 627,390.96, 865,805.01 and 340,911.05

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Solution

The fourth proportional to 627,390.96, 865,805.01 and 340,911.05 is: 470,460.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,390.96 : 865,805.01 = 340,911.05 : x
  2. Step 2: Convert to fraction form
    627,390.96/865,805.01 = 340,911.05/x
  3. Step 3: Cross multiply
    627,390.96x = 865,805.01 × 340,911.05
  4. Step 4: Simplify right side
    627,390.96x = 295,162,490,725.34
  5. Step 5: Solve for x
    x = 295,162,490,725.34/627,390.96
  6. Step 6: Final answer
    x = 470,460.22

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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.