Home / 1,688.32-2,329.64-942.28

Finding the Fourth Proportional to 1,688.32, 2,329.64 and 942.28

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Solution

The fourth proportional to 1,688.32, 2,329.64 and 942.28 is: 1,300.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.32 : 2,329.64 = 942.28 : x
  2. Step 2: Convert to fraction form
    1,688.32/2,329.64 = 942.28/x
  3. Step 3: Cross multiply
    1,688.32x = 2,329.64 × 942.28
  4. Step 4: Simplify right side
    1,688.32x = 2,195,173.18
  5. Step 5: Solve for x
    x = 2,195,173.18/1,688.32
  6. Step 6: Final answer
    x = 1,300.21

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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.