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Finding the Fourth Proportional to 1,475.77, 2,212.95 and 859.65

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Solution

The fourth proportional to 1,475.77, 2,212.95 and 859.65 is: 1,289.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,475.77 : 2,212.95 = 859.65 : x
  2. Step 2: Convert to fraction form
    1,475.77/2,212.95 = 859.65/x
  3. Step 3: Cross multiply
    1,475.77x = 2,212.95 × 859.65
  4. Step 4: Simplify right side
    1,475.77x = 1,902,358.17
  5. Step 5: Solve for x
    x = 1,902,358.17/1,475.77
  6. Step 6: Final answer
    x = 1,289.06

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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.