Home / 1,431.80-1,975.62-1,210.28

Finding the Fourth Proportional to 1,431.80, 1,975.62 and 1,210.28

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Solution

The fourth proportional to 1,431.80, 1,975.62 and 1,210.28 is: 1,669.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.80 : 1,975.62 = 1,210.28 : x
  2. Step 2: Convert to fraction form
    1,431.80/1,975.62 = 1,210.28/x
  3. Step 3: Cross multiply
    1,431.80x = 1,975.62 × 1,210.28
  4. Step 4: Simplify right side
    1,431.80x = 2,391,053.37
  5. Step 5: Solve for x
    x = 2,391,053.37/1,431.80
  6. Step 6: Final answer
    x = 1,669.96

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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.