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Finding the Fourth Proportional to 390,438.17, 537,687.20 and 366,108.71

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Solution

The fourth proportional to 390,438.17, 537,687.20 and 366,108.71 is: 504,182.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,438.17 : 537,687.20 = 366,108.71 : x
  2. Step 2: Convert to fraction form
    390,438.17/537,687.20 = 366,108.71/x
  3. Step 3: Cross multiply
    390,438.17x = 537,687.20 × 366,108.71
  4. Step 4: Simplify right side
    390,438.17x = 196,851,967,912.00
  5. Step 5: Solve for x
    x = 196,851,967,912.00/390,438.17
  6. Step 6: Final answer
    x = 504,182.17

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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.