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Finding the Fourth Proportional to 1,491.05, 2,056.51 and 900.97

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Solution

The fourth proportional to 1,491.05, 2,056.51 and 900.97 is: 1,242.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,491.05 : 2,056.51 = 900.97 : x
  2. Step 2: Convert to fraction form
    1,491.05/2,056.51 = 900.97/x
  3. Step 3: Cross multiply
    1,491.05x = 2,056.51 × 900.97
  4. Step 4: Simplify right side
    1,491.05x = 1,852,853.81
  5. Step 5: Solve for x
    x = 1,852,853.81/1,491.05
  6. Step 6: Final answer
    x = 1,242.65

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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.