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Finding the Fourth Proportional to 1,021.67, 1,409.60 and 602.06

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Solution

The fourth proportional to 1,021.67, 1,409.60 and 602.06 is: 830.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021.67 : 1,409.60 = 602.06 : x
  2. Step 2: Convert to fraction form
    1,021.67/1,409.60 = 602.06/x
  3. Step 3: Cross multiply
    1,021.67x = 1,409.60 × 602.06
  4. Step 4: Simplify right side
    1,021.67x = 848,656.73
  5. Step 5: Solve for x
    x = 848,656.73/1,021.67
  6. Step 6: Final answer
    x = 830.66

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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.