Home / 1,313.19-1,812.80-935.32

Finding the Fourth Proportional to 1,313.19, 1,812.80 and 935.32

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Solution

The fourth proportional to 1,313.19, 1,812.80 and 935.32 is: 1,291.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,313.19 : 1,812.80 = 935.32 : x
  2. Step 2: Convert to fraction form
    1,313.19/1,812.80 = 935.32/x
  3. Step 3: Cross multiply
    1,313.19x = 1,812.80 × 935.32
  4. Step 4: Simplify right side
    1,313.19x = 1,695,548.10
  5. Step 5: Solve for x
    x = 1,695,548.10/1,313.19
  6. Step 6: Final answer
    x = 1,291.17

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Double scale
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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.