Home / 2,878.38-3,972.29-1,699.45

Finding the Fourth Proportional to 2,878.38, 3,972.29 and 1,699.45

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Solution

The fourth proportional to 2,878.38, 3,972.29 and 1,699.45 is: 2,345.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,878.38 : 3,972.29 = 1,699.45 : x
  2. Step 2: Convert to fraction form
    2,878.38/3,972.29 = 1,699.45/x
  3. Step 3: Cross multiply
    2,878.38x = 3,972.29 × 1,699.45
  4. Step 4: Simplify right side
    2,878.38x = 6,750,689.81
  5. Step 5: Solve for x
    x = 6,750,689.81/2,878.38
  6. Step 6: Final answer
    x = 2,345.31

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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.