Home / 1,565.05-2,157.81-1,145.06

Finding the Fourth Proportional to 1,565.05, 2,157.81 and 1,145.06

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Solution

The fourth proportional to 1,565.05, 2,157.81 and 1,145.06 is: 1,578.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,565.05 : 2,157.81 = 1,145.06 : x
  2. Step 2: Convert to fraction form
    1,565.05/2,157.81 = 1,145.06/x
  3. Step 3: Cross multiply
    1,565.05x = 2,157.81 × 1,145.06
  4. Step 4: Simplify right side
    1,565.05x = 2,470,821.92
  5. Step 5: Solve for x
    x = 2,470,821.92/1,565.05
  6. Step 6: Final answer
    x = 1,578.75

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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.