Home / 1,688.15-2,532.60-518.32

Finding the Fourth Proportional to 1,688.15, 2,532.60 and 518.32

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Solution

The fourth proportional to 1,688.15, 2,532.60 and 518.32 is: 777.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.15 : 2,532.60 = 518.32 : x
  2. Step 2: Convert to fraction form
    1,688.15/2,532.60 = 518.32/x
  3. Step 3: Cross multiply
    1,688.15x = 2,532.60 × 518.32
  4. Step 4: Simplify right side
    1,688.15x = 1,312,684.57
  5. Step 5: Solve for x
    x = 1,312,684.57/1,688.15
  6. Step 6: Final answer
    x = 777.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.