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Finding the Fourth Proportional to 627,458.70, 865,890.68 and 355,578.39

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Solution

The fourth proportional to 627,458.70, 865,890.68 and 355,578.39 is: 490,696.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,458.70 : 865,890.68 = 355,578.39 : x
  2. Step 2: Convert to fraction form
    627,458.70/865,890.68 = 355,578.39/x
  3. Step 3: Cross multiply
    627,458.70x = 865,890.68 × 355,578.39
  4. Step 4: Simplify right side
    627,458.70x = 307,892,012,132.51
  5. Step 5: Solve for x
    x = 307,892,012,132.51/627,458.70
  6. Step 6: Final answer
    x = 490,696.85

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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.