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Finding the Fourth Proportional to 722.20, 1,087.52 and 700.67

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Solution

The fourth proportional to 722.20, 1,087.52 and 700.67 is: 1,055.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.20 : 1,087.52 = 700.67 : x
  2. Step 2: Convert to fraction form
    722.20/1,087.52 = 700.67/x
  3. Step 3: Cross multiply
    722.20x = 1,087.52 × 700.67
  4. Step 4: Simplify right side
    722.20x = 761,992.64
  5. Step 5: Solve for x
    x = 761,992.64/722.20
  6. Step 6: Final answer
    x = 1,055.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.