Home / 1,561.29-2,153.75-1,029.65

Finding the Fourth Proportional to 1,561.29, 2,153.75 and 1,029.65

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Solution

The fourth proportional to 1,561.29, 2,153.75 and 1,029.65 is: 1,420.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,561.29 : 2,153.75 = 1,029.65 : x
  2. Step 2: Convert to fraction form
    1,561.29/2,153.75 = 1,029.65/x
  3. Step 3: Cross multiply
    1,561.29x = 2,153.75 × 1,029.65
  4. Step 4: Simplify right side
    1,561.29x = 2,217,592.77
  5. Step 5: Solve for x
    x = 2,217,592.77/1,561.29
  6. Step 6: Final answer
    x = 1,420.36

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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.