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Finding the Fourth Proportional to 1,120.91, 1,546.74 and 623.47

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Solution

The fourth proportional to 1,120.91, 1,546.74 and 623.47 is: 860.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120.91 : 1,546.74 = 623.47 : x
  2. Step 2: Convert to fraction form
    1,120.91/1,546.74 = 623.47/x
  3. Step 3: Cross multiply
    1,120.91x = 1,546.74 × 623.47
  4. Step 4: Simplify right side
    1,120.91x = 964,345.99
  5. Step 5: Solve for x
    x = 964,345.99/1,120.91
  6. Step 6: Final answer
    x = 860.32

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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.