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Finding the Fourth Proportional to 1,267.15, 1,900.65 and 609.50

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Solution

The fourth proportional to 1,267.15, 1,900.65 and 609.50 is: 914.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,267.15 : 1,900.65 = 609.50 : x
  2. Step 2: Convert to fraction form
    1,267.15/1,900.65 = 609.50/x
  3. Step 3: Cross multiply
    1,267.15x = 1,900.65 × 609.50
  4. Step 4: Simplify right side
    1,267.15x = 1,158,446.18
  5. Step 5: Solve for x
    x = 1,158,446.18/1,267.15
  6. Step 6: Final answer
    x = 914.21

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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.