Home / 1,386.40-2,079.60-1,058.35

Finding the Fourth Proportional to 1,386.40, 2,079.60 and 1,058.35

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Solution

The fourth proportional to 1,386.40, 2,079.60 and 1,058.35 is: 1,587.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386.40 : 2,079.60 = 1,058.35 : x
  2. Step 2: Convert to fraction form
    1,386.40/2,079.60 = 1,058.35/x
  3. Step 3: Cross multiply
    1,386.40x = 2,079.60 × 1,058.35
  4. Step 4: Simplify right side
    1,386.40x = 2,200,944.66
  5. Step 5: Solve for x
    x = 2,200,944.66/1,386.40
  6. Step 6: Final answer
    x = 1,587.53

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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.