Home / 1,392.81-2,088.27-845.12

Finding the Fourth Proportional to 1,392.81, 2,088.27 and 845.12

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Solution

The fourth proportional to 1,392.81, 2,088.27 and 845.12 is: 1,267.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392.81 : 2,088.27 = 845.12 : x
  2. Step 2: Convert to fraction form
    1,392.81/2,088.27 = 845.12/x
  3. Step 3: Cross multiply
    1,392.81x = 2,088.27 × 845.12
  4. Step 4: Simplify right side
    1,392.81x = 1,764,828.30
  5. Step 5: Solve for x
    x = 1,764,828.30/1,392.81
  6. Step 6: Final answer
    x = 1,267.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.