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Finding the Fourth Proportional to 368,678.15, 508,504.21 and 278,037.93

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Solution

The fourth proportional to 368,678.15, 508,504.21 and 278,037.93 is: 383,487.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,678.15 : 508,504.21 = 278,037.93 : x
  2. Step 2: Convert to fraction form
    368,678.15/508,504.21 = 278,037.93/x
  3. Step 3: Cross multiply
    368,678.15x = 508,504.21 × 278,037.93
  4. Step 4: Simplify right side
    368,678.15x = 141,383,456,554.50
  5. Step 5: Solve for x
    x = 141,383,456,554.50/368,678.15
  6. Step 6: Final answer
    x = 383,487.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.