Home / 3,120.08-4,306.40-1,985.51

Finding the Fourth Proportional to 3,120.08, 4,306.40 and 1,985.51

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Solution

The fourth proportional to 3,120.08, 4,306.40 and 1,985.51 is: 2,740.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.08 : 4,306.40 = 1,985.51 : x
  2. Step 2: Convert to fraction form
    3,120.08/4,306.40 = 1,985.51/x
  3. Step 3: Cross multiply
    3,120.08x = 4,306.40 × 1,985.51
  4. Step 4: Simplify right side
    3,120.08x = 8,550,401.10
  5. Step 5: Solve for x
    x = 8,550,401.10/3,120.08
  6. Step 6: Final answer
    x = 2,740.45

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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.