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Finding the Fourth Proportional to 722.10, 1,077.42 and 705.51

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Solution

The fourth proportional to 722.10, 1,077.42 and 705.51 is: 1,052.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.10 : 1,077.42 = 705.51 : x
  2. Step 2: Convert to fraction form
    722.10/1,077.42 = 705.51/x
  3. Step 3: Cross multiply
    722.10x = 1,077.42 × 705.51
  4. Step 4: Simplify right side
    722.10x = 760,130.58
  5. Step 5: Solve for x
    x = 760,130.58/722.10
  6. Step 6: Final answer
    x = 1,052.67

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.