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Finding the Fourth Proportional to 505,718.64, 697,832.28 and 279,350.64

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Solution

The fourth proportional to 505,718.64, 697,832.28 and 279,350.64 is: 385,471.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,718.64 : 697,832.28 = 279,350.64 : x
  2. Step 2: Convert to fraction form
    505,718.64/697,832.28 = 279,350.64/x
  3. Step 3: Cross multiply
    505,718.64x = 697,832.28 × 279,350.64
  4. Step 4: Simplify right side
    505,718.64x = 194,939,894,030.66
  5. Step 5: Solve for x
    x = 194,939,894,030.66/505,718.64
  6. Step 6: Final answer
    x = 385,471.05

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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.