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Finding the Fourth Proportional to 399,960.99, 551,980.17 and 227,931.57

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Solution

The fourth proportional to 399,960.99, 551,980.17 and 227,931.57 is: 314,564.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,960.99 : 551,980.17 = 227,931.57 : x
  2. Step 2: Convert to fraction form
    399,960.99/551,980.17 = 227,931.57/x
  3. Step 3: Cross multiply
    399,960.99x = 551,980.17 × 227,931.57
  4. Step 4: Simplify right side
    399,960.99x = 125,813,706,756.97
  5. Step 5: Solve for x
    x = 125,813,706,756.97/399,960.99
  6. Step 6: Final answer
    x = 314,564.94

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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.