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Finding the Fourth Proportional to 617,872.80, 925,642.80 and 317,330.40

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Solution

The fourth proportional to 617,872.80, 925,642.80 and 317,330.40 is: 475,396.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,872.80 : 925,642.80 = 317,330.40 : x
  2. Step 2: Convert to fraction form
    617,872.80/925,642.80 = 317,330.40/x
  3. Step 3: Cross multiply
    617,872.80x = 925,642.80 × 317,330.40
  4. Step 4: Simplify right side
    617,872.80x = 293,734,599,981.12
  5. Step 5: Solve for x
    x = 293,734,599,981.12/617,872.80
  6. Step 6: Final answer
    x = 475,396.55

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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.