Home / 3,945-5,916.80-1,312.24

Finding the Fourth Proportional to 3,945, 5,916.80 and 1,312.24

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Solution

The fourth proportional to 3,945, 5,916.80 and 1,312.24 is: 1,968.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,945 : 5,916.80 = 1,312.24 : x
  2. Step 2: Convert to fraction form
    3,945/5,916.80 = 1,312.24/x
  3. Step 3: Cross multiply
    3,945x = 5,916.80 × 1,312.24
  4. Step 4: Simplify right side
    3,945x = 7,764,261.63
  5. Step 5: Solve for x
    x = 7,764,261.63/3,945
  6. Step 6: Final answer
    x = 1,968.13

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1.5x scale

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.