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Finding the Fourth Proportional to 390,391.86, 585,597.50 and 109,907.22

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Solution

The fourth proportional to 390,391.86, 585,597.50 and 109,907.22 is: 164,863.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,391.86 : 585,597.50 = 109,907.22 : x
  2. Step 2: Convert to fraction form
    390,391.86/585,597.50 = 109,907.22/x
  3. Step 3: Cross multiply
    390,391.86x = 585,597.50 × 109,907.22
  4. Step 4: Simplify right side
    390,391.86x = 64,361,393,263.95
  5. Step 5: Solve for x
    x = 64,361,393,263.95/390,391.86
  6. Step 6: Final answer
    x = 164,863.56

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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.