Home / 1,911.21-2,637.50-1,072.10

Finding the Fourth Proportional to 1,911.21, 2,637.50 and 1,072.10

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Solution

The fourth proportional to 1,911.21, 2,637.50 and 1,072.10 is: 1,479.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.21 : 2,637.50 = 1,072.10 : x
  2. Step 2: Convert to fraction form
    1,911.21/2,637.50 = 1,072.10/x
  3. Step 3: Cross multiply
    1,911.21x = 2,637.50 × 1,072.10
  4. Step 4: Simplify right side
    1,911.21x = 2,827,663.75
  5. Step 5: Solve for x
    x = 2,827,663.75/1,911.21
  6. Step 6: Final answer
    x = 1,479.51

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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.