Home / 1,572.55-2,356.99-1,390.30

Finding the Fourth Proportional to 1,572.55, 2,356.99 and 1,390.30

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Solution

The fourth proportional to 1,572.55, 2,356.99 and 1,390.30 is: 2,083.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,572.55 : 2,356.99 = 1,390.30 : x
  2. Step 2: Convert to fraction form
    1,572.55/2,356.99 = 1,390.30/x
  3. Step 3: Cross multiply
    1,572.55x = 2,356.99 × 1,390.30
  4. Step 4: Simplify right side
    1,572.55x = 3,276,921.65
  5. Step 5: Solve for x
    x = 3,276,921.65/1,572.55
  6. Step 6: Final answer
    x = 2,083.83

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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.