Home / 1,256.16-1,876.81-1,213.10

Finding the Fourth Proportional to 1,256.16, 1,876.81 and 1,213.10

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Solution

The fourth proportional to 1,256.16, 1,876.81 and 1,213.10 is: 1,812.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,256.16 : 1,876.81 = 1,213.10 : x
  2. Step 2: Convert to fraction form
    1,256.16/1,876.81 = 1,213.10/x
  3. Step 3: Cross multiply
    1,256.16x = 1,876.81 × 1,213.10
  4. Step 4: Simplify right side
    1,256.16x = 2,276,758.21
  5. Step 5: Solve for x
    x = 2,276,758.21/1,256.16
  6. Step 6: Final answer
    x = 1,812.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.