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Finding the Fourth Proportional to 1,325.98, 1,989.08 and 352.07

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Solution

The fourth proportional to 1,325.98, 1,989.08 and 352.07 is: 528.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325.98 : 1,989.08 = 352.07 : x
  2. Step 2: Convert to fraction form
    1,325.98/1,989.08 = 352.07/x
  3. Step 3: Cross multiply
    1,325.98x = 1,989.08 × 352.07
  4. Step 4: Simplify right side
    1,325.98x = 700,283.69
  5. Step 5: Solve for x
    x = 700,283.69/1,325.98
  6. Step 6: Final answer
    x = 528.13

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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.