Home / 1,346.26-1,857.18-821.38

Finding the Fourth Proportional to 1,346.26, 1,857.18 and 821.38

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Solution

The fourth proportional to 1,346.26, 1,857.18 and 821.38 is: 1,133.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,346.26 : 1,857.18 = 821.38 : x
  2. Step 2: Convert to fraction form
    1,346.26/1,857.18 = 821.38/x
  3. Step 3: Cross multiply
    1,346.26x = 1,857.18 × 821.38
  4. Step 4: Simplify right side
    1,346.26x = 1,525,450.51
  5. Step 5: Solve for x
    x = 1,525,450.51/1,346.26
  6. Step 6: Final answer
    x = 1,133.10

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1.5x scale

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.