Home / 2,119.62-2,925.10-1,188.18

Finding the Fourth Proportional to 2,119.62, 2,925.10 and 1,188.18

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Solution

The fourth proportional to 2,119.62, 2,925.10 and 1,188.18 is: 1,639.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,119.62 : 2,925.10 = 1,188.18 : x
  2. Step 2: Convert to fraction form
    2,119.62/2,925.10 = 1,188.18/x
  3. Step 3: Cross multiply
    2,119.62x = 2,925.10 × 1,188.18
  4. Step 4: Simplify right side
    2,119.62x = 3,475,545.32
  5. Step 5: Solve for x
    x = 3,475,545.32/2,119.62
  6. Step 6: Final answer
    x = 1,639.70

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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.