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Finding the Fourth Proportional to 1,574.15, 2,172.24 and 901.94

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Solution

The fourth proportional to 1,574.15, 2,172.24 and 901.94 is: 1,244.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,574.15 : 2,172.24 = 901.94 : x
  2. Step 2: Convert to fraction form
    1,574.15/2,172.24 = 901.94/x
  3. Step 3: Cross multiply
    1,574.15x = 2,172.24 × 901.94
  4. Step 4: Simplify right side
    1,574.15x = 1,959,219.28
  5. Step 5: Solve for x
    x = 1,959,219.28/1,574.15
  6. Step 6: Final answer
    x = 1,244.62

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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.