Home / 1,394.40-1,918.60-1,207.32

Finding the Fourth Proportional to 1,394.40, 1,918.60 and 1,207.32

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Solution

The fourth proportional to 1,394.40, 1,918.60 and 1,207.32 is: 1,661.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.40 : 1,918.60 = 1,207.32 : x
  2. Step 2: Convert to fraction form
    1,394.40/1,918.60 = 1,207.32/x
  3. Step 3: Cross multiply
    1,394.40x = 1,918.60 × 1,207.32
  4. Step 4: Simplify right side
    1,394.40x = 2,316,364.15
  5. Step 5: Solve for x
    x = 2,316,364.15/1,394.40
  6. Step 6: Final answer
    x = 1,661.19

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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.