Home / 1,688.72-2,330.51-942.75

Finding the Fourth Proportional to 1,688.72, 2,330.51 and 942.75

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Solution

The fourth proportional to 1,688.72, 2,330.51 and 942.75 is: 1,301.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.72 : 2,330.51 = 942.75 : x
  2. Step 2: Convert to fraction form
    1,688.72/2,330.51 = 942.75/x
  3. Step 3: Cross multiply
    1,688.72x = 2,330.51 × 942.75
  4. Step 4: Simplify right side
    1,688.72x = 2,197,083.59
  5. Step 5: Solve for x
    x = 2,197,083.59/1,688.72
  6. Step 6: Final answer
    x = 1,301.04

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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.