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Finding the Fourth Proportional to 1,399.05, 2,097.59 and 577.71

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Solution

The fourth proportional to 1,399.05, 2,097.59 and 577.71 is: 866.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,399.05 : 2,097.59 = 577.71 : x
  2. Step 2: Convert to fraction form
    1,399.05/2,097.59 = 577.71/x
  3. Step 3: Cross multiply
    1,399.05x = 2,097.59 × 577.71
  4. Step 4: Simplify right side
    1,399.05x = 1,211,795.83
  5. Step 5: Solve for x
    x = 1,211,795.83/1,399.05
  6. Step 6: Final answer
    x = 866.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.