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Finding the Fourth Proportional to 1,159.76, 1,739.64 and 475.76

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Solution

The fourth proportional to 1,159.76, 1,739.64 and 475.76 is: 713.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,159.76 : 1,739.64 = 475.76 : x
  2. Step 2: Convert to fraction form
    1,159.76/1,739.64 = 475.76/x
  3. Step 3: Cross multiply
    1,159.76x = 1,739.64 × 475.76
  4. Step 4: Simplify right side
    1,159.76x = 827,651.13
  5. Step 5: Solve for x
    x = 827,651.13/1,159.76
  6. Step 6: Final answer
    x = 713.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.