Home / 1,587.81-2,379.51-1,239.57

Finding the Fourth Proportional to 1,587.81, 2,379.51 and 1,239.57

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Solution

The fourth proportional to 1,587.81, 2,379.51 and 1,239.57 is: 1,857.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.81 : 2,379.51 = 1,239.57 : x
  2. Step 2: Convert to fraction form
    1,587.81/2,379.51 = 1,239.57/x
  3. Step 3: Cross multiply
    1,587.81x = 2,379.51 × 1,239.57
  4. Step 4: Simplify right side
    1,587.81x = 2,949,569.21
  5. Step 5: Solve for x
    x = 2,949,569.21/1,587.81
  6. Step 6: Final answer
    x = 1,857.63

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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.