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Finding the Fourth Proportional to 929.44, 1,395.06 and 683.40

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Solution

The fourth proportional to 929.44, 1,395.06 and 683.40 is: 1,025.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    929.44 : 1,395.06 = 683.40 : x
  2. Step 2: Convert to fraction form
    929.44/1,395.06 = 683.40/x
  3. Step 3: Cross multiply
    929.44x = 1,395.06 × 683.40
  4. Step 4: Simplify right side
    929.44x = 953,384.00
  5. Step 5: Solve for x
    x = 953,384.00/929.44
  6. Step 6: Final answer
    x = 1,025.76

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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.