Home / 1,985.87-2,739.75-1,531.76

Finding the Fourth Proportional to 1,985.87, 2,739.75 and 1,531.76

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Solution

The fourth proportional to 1,985.87, 2,739.75 and 1,531.76 is: 2,113.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.87 : 2,739.75 = 1,531.76 : x
  2. Step 2: Convert to fraction form
    1,985.87/2,739.75 = 1,531.76/x
  3. Step 3: Cross multiply
    1,985.87x = 2,739.75 × 1,531.76
  4. Step 4: Simplify right side
    1,985.87x = 4,196,625.76
  5. Step 5: Solve for x
    x = 4,196,625.76/1,985.87
  6. Step 6: Final answer
    x = 2,113.25

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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.