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Finding the Fourth Proportional to 401,329, 553,920.42 and 240,220

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Solution

The fourth proportional to 401,329, 553,920.42 and 240,220 is: 331,555.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,329 : 553,920.42 = 240,220 : x
  2. Step 2: Convert to fraction form
    401,329/553,920.42 = 240,220/x
  3. Step 3: Cross multiply
    401,329x = 553,920.42 × 240,220
  4. Step 4: Simplify right side
    401,329x = 133,062,763,292.40
  5. Step 5: Solve for x
    x = 133,062,763,292.40/401,329
  6. Step 6: Final answer
    x = 331,555.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.