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Finding the Fourth Proportional to 930.93, 1,395.06 and 669.40

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Solution

The fourth proportional to 930.93, 1,395.06 and 669.40 is: 1,003.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.93 : 1,395.06 = 669.40 : x
  2. Step 2: Convert to fraction form
    930.93/1,395.06 = 669.40/x
  3. Step 3: Cross multiply
    930.93x = 1,395.06 × 669.40
  4. Step 4: Simplify right side
    930.93x = 933,847.17
  5. Step 5: Solve for x
    x = 933,847.17/930.93
  6. Step 6: Final answer
    x = 1,003.14

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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.