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Finding the Fourth Proportional to 1,794.55, 2,688.04 and 821.47

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Solution

The fourth proportional to 1,794.55, 2,688.04 and 821.47 is: 1,230.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,794.55 : 2,688.04 = 821.47 : x
  2. Step 2: Convert to fraction form
    1,794.55/2,688.04 = 821.47/x
  3. Step 3: Cross multiply
    1,794.55x = 2,688.04 × 821.47
  4. Step 4: Simplify right side
    1,794.55x = 2,208,144.22
  5. Step 5: Solve for x
    x = 2,208,144.22/1,794.55
  6. Step 6: Final answer
    x = 1,230.47

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1.5x scale

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.