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Finding the Fourth Proportional to 941.65, 1,411.45 and 393.48

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Solution

The fourth proportional to 941.65, 1,411.45 and 393.48 is: 589.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.65 : 1,411.45 = 393.48 : x
  2. Step 2: Convert to fraction form
    941.65/1,411.45 = 393.48/x
  3. Step 3: Cross multiply
    941.65x = 1,411.45 × 393.48
  4. Step 4: Simplify right side
    941.65x = 555,377.35
  5. Step 5: Solve for x
    x = 555,377.35/941.65
  6. Step 6: Final answer
    x = 589.79

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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.