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Finding the Fourth Proportional to 627,280.54, 865,689.99 and 355,350.67

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Solution

The fourth proportional to 627,280.54, 865,689.99 and 355,350.67 is: 490,408.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,280.54 : 865,689.99 = 355,350.67 : x
  2. Step 2: Convert to fraction form
    627,280.54/865,689.99 = 355,350.67/x
  3. Step 3: Cross multiply
    627,280.54x = 865,689.99 × 355,350.67
  4. Step 4: Simplify right side
    627,280.54x = 307,623,517,958.79
  5. Step 5: Solve for x
    x = 307,623,517,958.79/627,280.54
  6. Step 6: Final answer
    x = 490,408.20

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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.