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Finding the Fourth Proportional to 404,284.80, 606,427.20 and 137,981.10

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Solution

The fourth proportional to 404,284.80, 606,427.20 and 137,981.10 is: 206,971.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,284.80 : 606,427.20 = 137,981.10 : x
  2. Step 2: Convert to fraction form
    404,284.80/606,427.20 = 137,981.10/x
  3. Step 3: Cross multiply
    404,284.80x = 606,427.20 × 137,981.10
  4. Step 4: Simplify right side
    404,284.80x = 83,675,492,125.92
  5. Step 5: Solve for x
    x = 83,675,492,125.92/404,284.80
  6. Step 6: Final answer
    x = 206,971.65

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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.