Home / 1,688.45-2,533.78-1,271.09

Finding the Fourth Proportional to 1,688.45, 2,533.78 and 1,271.09

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Solution

The fourth proportional to 1,688.45, 2,533.78 and 1,271.09 is: 1,907.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.45 : 2,533.78 = 1,271.09 : x
  2. Step 2: Convert to fraction form
    1,688.45/2,533.78 = 1,271.09/x
  3. Step 3: Cross multiply
    1,688.45x = 2,533.78 × 1,271.09
  4. Step 4: Simplify right side
    1,688.45x = 3,220,670.34
  5. Step 5: Solve for x
    x = 3,220,670.34/1,688.45
  6. Step 6: Final answer
    x = 1,907.48

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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.