Home / 1,688.36-2,329.79-942.35

Finding the Fourth Proportional to 1,688.36, 2,329.79 and 942.35

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Solution

The fourth proportional to 1,688.36, 2,329.79 and 942.35 is: 1,300.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.36 : 2,329.79 = 942.35 : x
  2. Step 2: Convert to fraction form
    1,688.36/2,329.79 = 942.35/x
  3. Step 3: Cross multiply
    1,688.36x = 2,329.79 × 942.35
  4. Step 4: Simplify right side
    1,688.36x = 2,195,461.25
  5. Step 5: Solve for x
    x = 2,195,461.25/1,688.36
  6. Step 6: Final answer
    x = 1,300.36

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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.