Home / 1,210.24-1,815.80-561.44

Finding the Fourth Proportional to 1,210.24, 1,815.80 and 561.44

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Solution

The fourth proportional to 1,210.24, 1,815.80 and 561.44 is: 842.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.24 : 1,815.80 = 561.44 : x
  2. Step 2: Convert to fraction form
    1,210.24/1,815.80 = 561.44/x
  3. Step 3: Cross multiply
    1,210.24x = 1,815.80 × 561.44
  4. Step 4: Simplify right side
    1,210.24x = 1,019,462.75
  5. Step 5: Solve for x
    x = 1,019,462.75/1,210.24
  6. Step 6: Final answer
    x = 842.36

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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.