Home / 2,312.16-3,186.72-1,690.08

Finding the Fourth Proportional to 2,312.16, 3,186.72 and 1,690.08

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Solution

The fourth proportional to 2,312.16, 3,186.72 and 1,690.08 is: 2,329.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,312.16 : 3,186.72 = 1,690.08 : x
  2. Step 2: Convert to fraction form
    2,312.16/3,186.72 = 1,690.08/x
  3. Step 3: Cross multiply
    2,312.16x = 3,186.72 × 1,690.08
  4. Step 4: Simplify right side
    2,312.16x = 5,385,811.74
  5. Step 5: Solve for x
    x = 5,385,811.74/2,312.16
  6. Step 6: Final answer
    x = 2,329.34

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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.