Home / 2,130.74-3,192.06-1,307.78

Finding the Fourth Proportional to 2,130.74, 3,192.06 and 1,307.78

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Solution

The fourth proportional to 2,130.74, 3,192.06 and 1,307.78 is: 1,959.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.74 : 3,192.06 = 1,307.78 : x
  2. Step 2: Convert to fraction form
    2,130.74/3,192.06 = 1,307.78/x
  3. Step 3: Cross multiply
    2,130.74x = 3,192.06 × 1,307.78
  4. Step 4: Simplify right side
    2,130.74x = 4,174,512.23
  5. Step 5: Solve for x
    x = 4,174,512.23/2,130.74
  6. Step 6: Final answer
    x = 1,959.18

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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.