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Finding the Fourth Proportional to 1,245.86, 1,869.07 and 368.35

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Solution

The fourth proportional to 1,245.86, 1,869.07 and 368.35 is: 552.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.86 : 1,869.07 = 368.35 : x
  2. Step 2: Convert to fraction form
    1,245.86/1,869.07 = 368.35/x
  3. Step 3: Cross multiply
    1,245.86x = 1,869.07 × 368.35
  4. Step 4: Simplify right side
    1,245.86x = 688,471.93
  5. Step 5: Solve for x
    x = 688,471.93/1,245.86
  6. Step 6: Final answer
    x = 552.61

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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.