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Finding the Fourth Proportional to 505,360.80, 697,398.12 and 279,007.92

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Solution

The fourth proportional to 505,360.80, 697,398.12 and 279,007.92 is: 385,031.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,360.80 : 697,398.12 = 279,007.92 : x
  2. Step 2: Convert to fraction form
    505,360.80/697,398.12 = 279,007.92/x
  3. Step 3: Cross multiply
    505,360.80x = 697,398.12 × 279,007.92
  4. Step 4: Simplify right side
    505,360.80x = 194,579,598,873.11
  5. Step 5: Solve for x
    x = 194,579,598,873.11/505,360.80
  6. Step 6: Final answer
    x = 385,031.05

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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.