Home / 1,572.30-2,171.10-1,155

Finding the Fourth Proportional to 1,572.30, 2,171.10 and 1,155

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Solution

The fourth proportional to 1,572.30, 2,171.10 and 1,155 is: 1,594.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,572.30 : 2,171.10 = 1,155 : x
  2. Step 2: Convert to fraction form
    1,572.30/2,171.10 = 1,155/x
  3. Step 3: Cross multiply
    1,572.30x = 2,171.10 × 1,155
  4. Step 4: Simplify right side
    1,572.30x = 2,507,620.50
  5. Step 5: Solve for x
    x = 2,507,620.50/1,572.30
  6. Step 6: Final answer
    x = 1,594.87

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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.