Home / 1,558.19-2,335.84-817.65

Finding the Fourth Proportional to 1,558.19, 2,335.84 and 817.65

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Solution

The fourth proportional to 1,558.19, 2,335.84 and 817.65 is: 1,225.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,558.19 : 2,335.84 = 817.65 : x
  2. Step 2: Convert to fraction form
    1,558.19/2,335.84 = 817.65/x
  3. Step 3: Cross multiply
    1,558.19x = 2,335.84 × 817.65
  4. Step 4: Simplify right side
    1,558.19x = 1,909,893.74
  5. Step 5: Solve for x
    x = 1,909,893.74/1,558.19
  6. Step 6: Final answer
    x = 1,225.71

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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.