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Finding the Fourth Proportional to 1,119.74, 1,680.19 and 462.10

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Solution

The fourth proportional to 1,119.74, 1,680.19 and 462.10 is: 693.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,119.74 : 1,680.19 = 462.10 : x
  2. Step 2: Convert to fraction form
    1,119.74/1,680.19 = 462.10/x
  3. Step 3: Cross multiply
    1,119.74x = 1,680.19 × 462.10
  4. Step 4: Simplify right side
    1,119.74x = 776,415.80
  5. Step 5: Solve for x
    x = 776,415.80/1,119.74
  6. Step 6: Final answer
    x = 693.39

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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.