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Finding the Fourth Proportional to 1,491.65, 2,059.29 and 1,020.23

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Solution

The fourth proportional to 1,491.65, 2,059.29 and 1,020.23 is: 1,408.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,491.65 : 2,059.29 = 1,020.23 : x
  2. Step 2: Convert to fraction form
    1,491.65/2,059.29 = 1,020.23/x
  3. Step 3: Cross multiply
    1,491.65x = 2,059.29 × 1,020.23
  4. Step 4: Simplify right side
    1,491.65x = 2,100,946.86
  5. Step 5: Solve for x
    x = 2,100,946.86/1,491.65
  6. Step 6: Final answer
    x = 1,408.47

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1.5x scale

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.