Home / 1,587.03-2,190.71-1,420.95

Finding the Fourth Proportional to 1,587.03, 2,190.71 and 1,420.95

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Solution

The fourth proportional to 1,587.03, 2,190.71 and 1,420.95 is: 1,961.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.03 : 2,190.71 = 1,420.95 : x
  2. Step 2: Convert to fraction form
    1,587.03/2,190.71 = 1,420.95/x
  3. Step 3: Cross multiply
    1,587.03x = 2,190.71 × 1,420.95
  4. Step 4: Simplify right side
    1,587.03x = 3,112,889.37
  5. Step 5: Solve for x
    x = 3,112,889.37/1,587.03
  6. Step 6: Final answer
    x = 1,961.46

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1.5x scale

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.