Home / 1,688.70-2,330.51-942.69

Finding the Fourth Proportional to 1,688.70, 2,330.51 and 942.69

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Solution

The fourth proportional to 1,688.70, 2,330.51 and 942.69 is: 1,300.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.70 : 2,330.51 = 942.69 : x
  2. Step 2: Convert to fraction form
    1,688.70/2,330.51 = 942.69/x
  3. Step 3: Cross multiply
    1,688.70x = 2,330.51 × 942.69
  4. Step 4: Simplify right side
    1,688.70x = 2,196,943.76
  5. Step 5: Solve for x
    x = 2,196,943.76/1,688.70
  6. Step 6: Final answer
    x = 1,300.97

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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.