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Finding the Fourth Proportional to 1,050.54, 1,450.20 and 720.66

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Solution

The fourth proportional to 1,050.54, 1,450.20 and 720.66 is: 994.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,050.54 : 1,450.20 = 720.66 : x
  2. Step 2: Convert to fraction form
    1,050.54/1,450.20 = 720.66/x
  3. Step 3: Cross multiply
    1,050.54x = 1,450.20 × 720.66
  4. Step 4: Simplify right side
    1,050.54x = 1,045,101.13
  5. Step 5: Solve for x
    x = 1,045,101.13/1,050.54
  6. Step 6: Final answer
    x = 994.82

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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.