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Finding the Fourth Proportional to 1,237.37, 1,856.07 and 415.71

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Solution

The fourth proportional to 1,237.37, 1,856.07 and 415.71 is: 623.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,237.37 : 1,856.07 = 415.71 : x
  2. Step 2: Convert to fraction form
    1,237.37/1,856.07 = 415.71/x
  3. Step 3: Cross multiply
    1,237.37x = 1,856.07 × 415.71
  4. Step 4: Simplify right side
    1,237.37x = 771,586.86
  5. Step 5: Solve for x
    x = 771,586.86/1,237.37
  6. Step 6: Final answer
    x = 623.57

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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.