Home / 1,911.28-2,864.70-1,565.20

Finding the Fourth Proportional to 1,911.28, 2,864.70 and 1,565.20

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Solution

The fourth proportional to 1,911.28, 2,864.70 and 1,565.20 is: 2,345.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.28 : 2,864.70 = 1,565.20 : x
  2. Step 2: Convert to fraction form
    1,911.28/2,864.70 = 1,565.20/x
  3. Step 3: Cross multiply
    1,911.28x = 2,864.70 × 1,565.20
  4. Step 4: Simplify right side
    1,911.28x = 4,483,828.44
  5. Step 5: Solve for x
    x = 4,483,828.44/1,911.28
  6. Step 6: Final answer
    x = 2,345.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.