Home / 1,871.31-2,580.98-1,207.77

Finding the Fourth Proportional to 1,871.31, 2,580.98 and 1,207.77

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Solution

The fourth proportional to 1,871.31, 2,580.98 and 1,207.77 is: 1,665.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,871.31 : 2,580.98 = 1,207.77 : x
  2. Step 2: Convert to fraction form
    1,871.31/2,580.98 = 1,207.77/x
  3. Step 3: Cross multiply
    1,871.31x = 2,580.98 × 1,207.77
  4. Step 4: Simplify right side
    1,871.31x = 3,117,224.18
  5. Step 5: Solve for x
    x = 3,117,224.18/1,871.31
  6. Step 6: Final answer
    x = 1,665.80

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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.