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Finding the Fourth Proportional to 1,120.84, 1,546.76 and 623.50

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Solution

The fourth proportional to 1,120.84, 1,546.76 and 623.50 is: 860.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120.84 : 1,546.76 = 623.50 : x
  2. Step 2: Convert to fraction form
    1,120.84/1,546.76 = 623.50/x
  3. Step 3: Cross multiply
    1,120.84x = 1,546.76 × 623.50
  4. Step 4: Simplify right side
    1,120.84x = 964,404.86
  5. Step 5: Solve for x
    x = 964,404.86/1,120.84
  6. Step 6: Final answer
    x = 860.43

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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.