Home / 1,313.10-1,812.36-753.66

Finding the Fourth Proportional to 1,313.10, 1,812.36 and 753.66

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Solution

The fourth proportional to 1,313.10, 1,812.36 and 753.66 is: 1,040.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,313.10 : 1,812.36 = 753.66 : x
  2. Step 2: Convert to fraction form
    1,313.10/1,812.36 = 753.66/x
  3. Step 3: Cross multiply
    1,313.10x = 1,812.36 × 753.66
  4. Step 4: Simplify right side
    1,313.10x = 1,365,903.24
  5. Step 5: Solve for x
    x = 1,365,903.24/1,313.10
  6. Step 6: Final answer
    x = 1,040.21

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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.