Home / 1,688.90-2,330.97-1,248.08

Finding the Fourth Proportional to 1,688.90, 2,330.97 and 1,248.08

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Solution

The fourth proportional to 1,688.90, 2,330.97 and 1,248.08 is: 1,722.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.90 : 2,330.97 = 1,248.08 : x
  2. Step 2: Convert to fraction form
    1,688.90/2,330.97 = 1,248.08/x
  3. Step 3: Cross multiply
    1,688.90x = 2,330.97 × 1,248.08
  4. Step 4: Simplify right side
    1,688.90x = 2,909,237.04
  5. Step 5: Solve for x
    x = 2,909,237.04/1,688.90
  6. Step 6: Final answer
    x = 1,722.56

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1.5x scale

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.