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Finding the Fourth Proportional to 617,918.80, 925,711.80 and 317,376.40

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Solution

The fourth proportional to 617,918.80, 925,711.80 and 317,376.40 is: 475,465.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,918.80 : 925,711.80 = 317,376.40 : x
  2. Step 2: Convert to fraction form
    617,918.80/925,711.80 = 317,376.40/x
  3. Step 3: Cross multiply
    617,918.80x = 925,711.80 × 317,376.40
  4. Step 4: Simplify right side
    617,918.80x = 293,799,078,521.52
  5. Step 5: Solve for x
    x = 293,799,078,521.52/617,918.80
  6. Step 6: Final answer
    x = 475,465.51

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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.