Home / 2,911.85-4,018.40-1,585.57

Finding the Fourth Proportional to 2,911.85, 4,018.40 and 1,585.57

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Solution

The fourth proportional to 2,911.85, 4,018.40 and 1,585.57 is: 2,188.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,911.85 : 4,018.40 = 1,585.57 : x
  2. Step 2: Convert to fraction form
    2,911.85/4,018.40 = 1,585.57/x
  3. Step 3: Cross multiply
    2,911.85x = 4,018.40 × 1,585.57
  4. Step 4: Simplify right side
    2,911.85x = 6,371,454.49
  5. Step 5: Solve for x
    x = 6,371,454.49/2,911.85
  6. Step 6: Final answer
    x = 2,188.11

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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.