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Finding the Fourth Proportional to 1,325.77, 1,988.65 and 351.89

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Solution

The fourth proportional to 1,325.77, 1,988.65 and 351.89 is: 527.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325.77 : 1,988.65 = 351.89 : x
  2. Step 2: Convert to fraction form
    1,325.77/1,988.65 = 351.89/x
  3. Step 3: Cross multiply
    1,325.77x = 1,988.65 × 351.89
  4. Step 4: Simplify right side
    1,325.77x = 699,795.19
  5. Step 5: Solve for x
    x = 699,795.19/1,325.77
  6. Step 6: Final answer
    x = 527.84

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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.