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Finding the Fourth Proportional to 627,465.70, 865,900.32 and 355,585.40

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Solution

The fourth proportional to 627,465.70, 865,900.32 and 355,585.40 is: 490,706.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,465.70 : 865,900.32 = 355,585.40 : x
  2. Step 2: Convert to fraction form
    627,465.70/865,900.32 = 355,585.40/x
  3. Step 3: Cross multiply
    627,465.70x = 865,900.32 × 355,585.40
  4. Step 4: Simplify right side
    627,465.70x = 307,901,511,647.33
  5. Step 5: Solve for x
    x = 307,901,511,647.33/627,465.70
  6. Step 6: Final answer
    x = 490,706.52

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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.