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Finding the Fourth Proportional to 1,812.77, 2,502.80 and 1,392.32

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Solution

The fourth proportional to 1,812.77, 2,502.80 and 1,392.32 is: 1,922.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,812.77 : 2,502.80 = 1,392.32 : x
  2. Step 2: Convert to fraction form
    1,812.77/2,502.80 = 1,392.32/x
  3. Step 3: Cross multiply
    1,812.77x = 2,502.80 × 1,392.32
  4. Step 4: Simplify right side
    1,812.77x = 3,484,679.02
  5. Step 5: Solve for x
    x = 3,484,679.02/1,812.77
  6. Step 6: Final answer
    x = 1,922.30

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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.