Home / 2,688.57-4,031.64-1,872.09

Finding the Fourth Proportional to 2,688.57, 4,031.64 and 1,872.09

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Solution

The fourth proportional to 2,688.57, 4,031.64 and 1,872.09 is: 2,807.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.57 : 4,031.64 = 1,872.09 : x
  2. Step 2: Convert to fraction form
    2,688.57/4,031.64 = 1,872.09/x
  3. Step 3: Cross multiply
    2,688.57x = 4,031.64 × 1,872.09
  4. Step 4: Simplify right side
    2,688.57x = 7,547,592.93
  5. Step 5: Solve for x
    x = 7,547,592.93/2,688.57
  6. Step 6: Final answer
    x = 2,807.29

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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.