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Finding the Fourth Proportional to 1,465.05, 2,021.74 and 801.90

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Solution

The fourth proportional to 1,465.05, 2,021.74 and 801.90 is: 1,106.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,465.05 : 2,021.74 = 801.90 : x
  2. Step 2: Convert to fraction form
    1,465.05/2,021.74 = 801.90/x
  3. Step 3: Cross multiply
    1,465.05x = 2,021.74 × 801.90
  4. Step 4: Simplify right side
    1,465.05x = 1,621,235.81
  5. Step 5: Solve for x
    x = 1,621,235.81/1,465.05
  6. Step 6: Final answer
    x = 1,106.61

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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.