Home / 3,397.09-4,686.78-1,980.40

Finding the Fourth Proportional to 3,397.09, 4,686.78 and 1,980.40

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Solution

The fourth proportional to 3,397.09, 4,686.78 and 1,980.40 is: 2,732.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,397.09 : 4,686.78 = 1,980.40 : x
  2. Step 2: Convert to fraction form
    3,397.09/4,686.78 = 1,980.40/x
  3. Step 3: Cross multiply
    3,397.09x = 4,686.78 × 1,980.40
  4. Step 4: Simplify right side
    3,397.09x = 9,281,699.11
  5. Step 5: Solve for x
    x = 9,281,699.11/3,397.09
  6. Step 6: Final answer
    x = 2,732.25

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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.