Home / 2,155.40-3,233.10-1,291.40

Finding the Fourth Proportional to 2,155.40, 3,233.10 and 1,291.40

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Solution

The fourth proportional to 2,155.40, 3,233.10 and 1,291.40 is: 1,937.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,155.40 : 3,233.10 = 1,291.40 : x
  2. Step 2: Convert to fraction form
    2,155.40/3,233.10 = 1,291.40/x
  3. Step 3: Cross multiply
    2,155.40x = 3,233.10 × 1,291.40
  4. Step 4: Simplify right side
    2,155.40x = 4,175,225.34
  5. Step 5: Solve for x
    x = 4,175,225.34/2,155.40
  6. Step 6: Final answer
    x = 1,937.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.