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Finding the Fourth Proportional to 1,267.05, 1,900.55 and 650.40

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Solution

The fourth proportional to 1,267.05, 1,900.55 and 650.40 is: 975.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,267.05 : 1,900.55 = 650.40 : x
  2. Step 2: Convert to fraction form
    1,267.05/1,900.55 = 650.40/x
  3. Step 3: Cross multiply
    1,267.05x = 1,900.55 × 650.40
  4. Step 4: Simplify right side
    1,267.05x = 1,236,108.22
  5. Step 5: Solve for x
    x = 1,236,108.22/1,267.05
  6. Step 6: Final answer
    x = 975.58

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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.