Home / 1,312.44-1,812.72-1,207.14

Finding the Fourth Proportional to 1,312.44, 1,812.72 and 1,207.14

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Solution

The fourth proportional to 1,312.44, 1,812.72 and 1,207.14 is: 1,667.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312.44 : 1,812.72 = 1,207.14 : x
  2. Step 2: Convert to fraction form
    1,312.44/1,812.72 = 1,207.14/x
  3. Step 3: Cross multiply
    1,312.44x = 1,812.72 × 1,207.14
  4. Step 4: Simplify right side
    1,312.44x = 2,188,206.82
  5. Step 5: Solve for x
    x = 2,188,206.82/1,312.44
  6. Step 6: Final answer
    x = 1,667.28

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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.