Home / 2,887.40-3,985.05-1,708.85

Finding the Fourth Proportional to 2,887.40, 3,985.05 and 1,708.85

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Solution

The fourth proportional to 2,887.40, 3,985.05 and 1,708.85 is: 2,358.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,887.40 : 3,985.05 = 1,708.85 : x
  2. Step 2: Convert to fraction form
    2,887.40/3,985.05 = 1,708.85/x
  3. Step 3: Cross multiply
    2,887.40x = 3,985.05 × 1,708.85
  4. Step 4: Simplify right side
    2,887.40x = 6,809,832.77
  5. Step 5: Solve for x
    x = 6,809,832.77/2,887.40
  6. Step 6: Final answer
    x = 2,358.47

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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.