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Finding the Fourth Proportional to 627,278.54, 865,687.23 and 355,348.67

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Solution

The fourth proportional to 627,278.54, 865,687.23 and 355,348.67 is: 490,405.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,278.54 : 865,687.23 = 355,348.67 : x
  2. Step 2: Convert to fraction form
    627,278.54/865,687.23 = 355,348.67/x
  3. Step 3: Cross multiply
    627,278.54x = 865,687.23 × 355,348.67
  4. Step 4: Simplify right side
    627,278.54x = 307,620,804,039.74
  5. Step 5: Solve for x
    x = 307,620,804,039.74/627,278.54
  6. Step 6: Final answer
    x = 490,405.43

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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.