Home / 1,686.51-2,516.57-1,511.40

Finding the Fourth Proportional to 1,686.51, 2,516.57 and 1,511.40

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Solution

The fourth proportional to 1,686.51, 2,516.57 and 1,511.40 is: 2,255.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,686.51 : 2,516.57 = 1,511.40 : x
  2. Step 2: Convert to fraction form
    1,686.51/2,516.57 = 1,511.40/x
  3. Step 3: Cross multiply
    1,686.51x = 2,516.57 × 1,511.40
  4. Step 4: Simplify right side
    1,686.51x = 3,803,543.90
  5. Step 5: Solve for x
    x = 3,803,543.90/1,686.51
  6. Step 6: Final answer
    x = 2,255.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.