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Finding the Fourth Proportional to 646.07, 891.49 and 384.04

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Solution

The fourth proportional to 646.07, 891.49 and 384.04 is: 529.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.07 : 891.49 = 384.04 : x
  2. Step 2: Convert to fraction form
    646.07/891.49 = 384.04/x
  3. Step 3: Cross multiply
    646.07x = 891.49 × 384.04
  4. Step 4: Simplify right side
    646.07x = 342,361.44
  5. Step 5: Solve for x
    x = 342,361.44/646.07
  6. Step 6: Final answer
    x = 529.91

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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.