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Finding the Fourth Proportional to 1,004.42, 1,386.84 and 650.55

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Solution

The fourth proportional to 1,004.42, 1,386.84 and 650.55 is: 898.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,004.42 : 1,386.84 = 650.55 : x
  2. Step 2: Convert to fraction form
    1,004.42/1,386.84 = 650.55/x
  3. Step 3: Cross multiply
    1,004.42x = 1,386.84 × 650.55
  4. Step 4: Simplify right side
    1,004.42x = 902,208.76
  5. Step 5: Solve for x
    x = 902,208.76/1,004.42
  6. Step 6: Final answer
    x = 898.24

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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.