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Finding the Fourth Proportional to 722.07, 990.07 and 651.87

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Solution

The fourth proportional to 722.07, 990.07 and 651.87 is: 893.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.07 : 990.07 = 651.87 : x
  2. Step 2: Convert to fraction form
    722.07/990.07 = 651.87/x
  3. Step 3: Cross multiply
    722.07x = 990.07 × 651.87
  4. Step 4: Simplify right side
    722.07x = 645,395.30
  5. Step 5: Solve for x
    x = 645,395.30/722.07
  6. Step 6: Final answer
    x = 893.81

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.