Home / 1,638.05-2,259.95-929.81

Finding the Fourth Proportional to 1,638.05, 2,259.95 and 929.81

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Solution

The fourth proportional to 1,638.05, 2,259.95 and 929.81 is: 1,282.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.05 : 2,259.95 = 929.81 : x
  2. Step 2: Convert to fraction form
    1,638.05/2,259.95 = 929.81/x
  3. Step 3: Cross multiply
    1,638.05x = 2,259.95 × 929.81
  4. Step 4: Simplify right side
    1,638.05x = 2,101,325.11
  5. Step 5: Solve for x
    x = 2,101,325.11/1,638.05
  6. Step 6: Final answer
    x = 1,282.83

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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.