Home / 1,688.79-2,330.65-942.90

Finding the Fourth Proportional to 1,688.79, 2,330.65 and 942.90

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Solution

The fourth proportional to 1,688.79, 2,330.65 and 942.90 is: 1,301.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.79 : 2,330.65 = 942.90 : x
  2. Step 2: Convert to fraction form
    1,688.79/2,330.65 = 942.90/x
  3. Step 3: Cross multiply
    1,688.79x = 2,330.65 × 942.90
  4. Step 4: Simplify right side
    1,688.79x = 2,197,566.23
  5. Step 5: Solve for x
    x = 2,197,566.23/1,688.79
  6. Step 6: Final answer
    x = 1,301.27

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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.