Home / 1,688.81-2,331.59-1,101.02

Finding the Fourth Proportional to 1,688.81, 2,331.59 and 1,101.02

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Solution

The fourth proportional to 1,688.81, 2,331.59 and 1,101.02 is: 1,520.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.81 : 2,331.59 = 1,101.02 : x
  2. Step 2: Convert to fraction form
    1,688.81/2,331.59 = 1,101.02/x
  3. Step 3: Cross multiply
    1,688.81x = 2,331.59 × 1,101.02
  4. Step 4: Simplify right side
    1,688.81x = 2,567,110.06
  5. Step 5: Solve for x
    x = 2,567,110.06/1,688.81
  6. Step 6: Final answer
    x = 1,520.07

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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.