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Finding the Fourth Proportional to 537,847.20, 805,021.20 and 418,874.40

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Solution

The fourth proportional to 537,847.20, 805,021.20 and 418,874.40 is: 626,949.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    537,847.20 : 805,021.20 = 418,874.40 : x
  2. Step 2: Convert to fraction form
    537,847.20/805,021.20 = 418,874.40/x
  3. Step 3: Cross multiply
    537,847.20x = 805,021.20 × 418,874.40
  4. Step 4: Simplify right side
    537,847.20x = 337,202,772,137.28
  5. Step 5: Solve for x
    x = 337,202,772,137.28/537,847.20
  6. Step 6: Final answer
    x = 626,949.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.