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Finding the Fourth Proportional to 1,302.86, 1,954.30 and 437.78

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Solution

The fourth proportional to 1,302.86, 1,954.30 and 437.78 is: 656.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,302.86 : 1,954.30 = 437.78 : x
  2. Step 2: Convert to fraction form
    1,302.86/1,954.30 = 437.78/x
  3. Step 3: Cross multiply
    1,302.86x = 1,954.30 × 437.78
  4. Step 4: Simplify right side
    1,302.86x = 855,553.45
  5. Step 5: Solve for x
    x = 855,553.45/1,302.86
  6. Step 6: Final answer
    x = 656.67

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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.