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Finding the Fourth Proportional to 505,247.62, 697,240.28 and 278,891.50

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Solution

The fourth proportional to 505,247.62, 697,240.28 and 278,891.50 is: 384,869.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,247.62 : 697,240.28 = 278,891.50 : x
  2. Step 2: Convert to fraction form
    505,247.62/697,240.28 = 278,891.50/x
  3. Step 3: Cross multiply
    505,247.62x = 697,240.28 × 278,891.50
  4. Step 4: Simplify right side
    505,247.62x = 194,454,387,549.62
  5. Step 5: Solve for x
    x = 194,454,387,549.62/505,247.62
  6. Step 6: Final answer
    x = 384,869.48

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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.