Home / 1,688.21-2,532.92-1,225.20

Finding the Fourth Proportional to 1,688.21, 2,532.92 and 1,225.20

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Solution

The fourth proportional to 1,688.21, 2,532.92 and 1,225.20 is: 1,838.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.21 : 2,532.92 = 1,225.20 : x
  2. Step 2: Convert to fraction form
    1,688.21/2,532.92 = 1,225.20/x
  3. Step 3: Cross multiply
    1,688.21x = 2,532.92 × 1,225.20
  4. Step 4: Simplify right side
    1,688.21x = 3,103,327.46
  5. Step 5: Solve for x
    x = 3,103,327.46/1,688.21
  6. Step 6: Final answer
    x = 1,838.24

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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.