Home / 1,688.92-2,330.64-942.87

Finding the Fourth Proportional to 1,688.92, 2,330.64 and 942.87

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Solution

The fourth proportional to 1,688.92, 2,330.64 and 942.87 is: 1,301.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.92 : 2,330.64 = 942.87 : x
  2. Step 2: Convert to fraction form
    1,688.92/2,330.64 = 942.87/x
  3. Step 3: Cross multiply
    1,688.92x = 2,330.64 × 942.87
  4. Step 4: Simplify right side
    1,688.92x = 2,197,499.28
  5. Step 5: Solve for x
    x = 2,197,499.28/1,688.92
  6. Step 6: Final answer
    x = 1,301.13

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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.