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Finding the Fourth Proportional to 627,459.70, 865,892.05 and 355,579.39

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Solution

The fourth proportional to 627,459.70, 865,892.05 and 355,579.39 is: 490,698.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,459.70 : 865,892.05 = 355,579.39 : x
  2. Step 2: Convert to fraction form
    627,459.70/865,892.05 = 355,579.39/x
  3. Step 3: Cross multiply
    627,459.70x = 865,892.05 × 355,579.39
  4. Step 4: Simplify right side
    627,459.70x = 307,893,366,944.85
  5. Step 5: Solve for x
    x = 307,893,366,944.85/627,459.70
  6. Step 6: Final answer
    x = 490,698.23

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1.5x scale

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.