Home / 1,405.32-2,105.80-1,058.28

Finding the Fourth Proportional to 1,405.32, 2,105.80 and 1,058.28

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Solution

The fourth proportional to 1,405.32, 2,105.80 and 1,058.28 is: 1,585.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,405.32 : 2,105.80 = 1,058.28 : x
  2. Step 2: Convert to fraction form
    1,405.32/2,105.80 = 1,058.28/x
  3. Step 3: Cross multiply
    1,405.32x = 2,105.80 × 1,058.28
  4. Step 4: Simplify right side
    1,405.32x = 2,228,526.02
  5. Step 5: Solve for x
    x = 2,228,526.02/1,405.32
  6. Step 6: Final answer
    x = 1,585.78

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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.