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Finding the Fourth Proportional to 505,527.12, 697,630.80 and 276,078.48

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Solution

The fourth proportional to 505,527.12, 697,630.80 and 276,078.48 is: 380,990.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,527.12 : 697,630.80 = 276,078.48 : x
  2. Step 2: Convert to fraction form
    505,527.12/697,630.80 = 276,078.48/x
  3. Step 3: Cross multiply
    505,527.12x = 697,630.80 × 276,078.48
  4. Step 4: Simplify right side
    505,527.12x = 192,600,850,865.18
  5. Step 5: Solve for x
    x = 192,600,850,865.18/505,527.12
  6. Step 6: Final answer
    x = 380,990.15

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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.