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Finding the Fourth Proportional to 505,580.48, 697,686.72 and 279,221.12

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Solution

The fourth proportional to 505,580.48, 697,686.72 and 279,221.12 is: 385,317.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,580.48 : 697,686.72 = 279,221.12 : x
  2. Step 2: Convert to fraction form
    505,580.48/697,686.72 = 279,221.12/x
  3. Step 3: Cross multiply
    505,580.48x = 697,686.72 × 279,221.12
  4. Step 4: Simplify right side
    505,580.48x = 194,808,867,367.53
  5. Step 5: Solve for x
    x = 194,808,867,367.53/505,580.48
  6. Step 6: Final answer
    x = 385,317.22

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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.