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Finding the Fourth Proportional to 664,895.20, 997,969.20 and 349,578.40

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Solution

The fourth proportional to 664,895.20, 997,969.20 and 349,578.40 is: 524,696.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,895.20 : 997,969.20 = 349,578.40 : x
  2. Step 2: Convert to fraction form
    664,895.20/997,969.20 = 349,578.40/x
  3. Step 3: Cross multiply
    664,895.20x = 997,969.20 × 349,578.40
  4. Step 4: Simplify right side
    664,895.20x = 348,868,476,185.28
  5. Step 5: Solve for x
    x = 348,868,476,185.28/664,895.20
  6. Step 6: Final answer
    x = 524,696.94

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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.