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Finding the Fourth Proportional to 1,120.90, 1,546.77 and 623.51

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Solution

The fourth proportional to 1,120.90, 1,546.77 and 623.51 is: 860.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120.90 : 1,546.77 = 623.51 : x
  2. Step 2: Convert to fraction form
    1,120.90/1,546.77 = 623.51/x
  3. Step 3: Cross multiply
    1,120.90x = 1,546.77 × 623.51
  4. Step 4: Simplify right side
    1,120.90x = 964,426.56
  5. Step 5: Solve for x
    x = 964,426.56/1,120.90
  6. Step 6: Final answer
    x = 860.40

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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.