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Finding the Fourth Proportional to 505,117.62, 697,060.89 and 278,761.50

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Solution

The fourth proportional to 505,117.62, 697,060.89 and 278,761.50 is: 384,690.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,117.62 : 697,060.89 = 278,761.50 : x
  2. Step 2: Convert to fraction form
    505,117.62/697,060.89 = 278,761.50/x
  3. Step 3: Cross multiply
    505,117.62x = 697,060.89 × 278,761.50
  4. Step 4: Simplify right side
    505,117.62x = 194,313,739,287.74
  5. Step 5: Solve for x
    x = 194,313,739,287.74/505,117.62
  6. Step 6: Final answer
    x = 384,690.08

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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.