Home / 1,587.72-2,190.60-1,325.28

Finding the Fourth Proportional to 1,587.72, 2,190.60 and 1,325.28

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Solution

The fourth proportional to 1,587.72, 2,190.60 and 1,325.28 is: 1,828.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.72 : 2,190.60 = 1,325.28 : x
  2. Step 2: Convert to fraction form
    1,587.72/2,190.60 = 1,325.28/x
  3. Step 3: Cross multiply
    1,587.72x = 2,190.60 × 1,325.28
  4. Step 4: Simplify right side
    1,587.72x = 2,903,158.37
  5. Step 5: Solve for x
    x = 2,903,158.37/1,587.72
  6. Step 6: Final answer
    x = 1,828.51

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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.