Home / 1,569.48-2,165.69-939.87

Finding the Fourth Proportional to 1,569.48, 2,165.69 and 939.87

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Solution

The fourth proportional to 1,569.48, 2,165.69 and 939.87 is: 1,296.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,569.48 : 2,165.69 = 939.87 : x
  2. Step 2: Convert to fraction form
    1,569.48/2,165.69 = 939.87/x
  3. Step 3: Cross multiply
    1,569.48x = 2,165.69 × 939.87
  4. Step 4: Simplify right side
    1,569.48x = 2,035,462.36
  5. Step 5: Solve for x
    x = 2,035,462.36/1,569.48
  6. Step 6: Final answer
    x = 1,296.90

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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.