Home / 1,985.85-2,740.65-1,146.85

Finding the Fourth Proportional to 1,985.85, 2,740.65 and 1,146.85

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Solution

The fourth proportional to 1,985.85, 2,740.65 and 1,146.85 is: 1,582.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.85 : 2,740.65 = 1,146.85 : x
  2. Step 2: Convert to fraction form
    1,985.85/2,740.65 = 1,146.85/x
  3. Step 3: Cross multiply
    1,985.85x = 2,740.65 × 1,146.85
  4. Step 4: Simplify right side
    1,985.85x = 3,143,114.45
  5. Step 5: Solve for x
    x = 3,143,114.45/1,985.85
  6. Step 6: Final answer
    x = 1,582.76

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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.