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Finding the Fourth Proportional to 276,426, 381,486.96 and 155,578.68

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Solution

The fourth proportional to 276,426, 381,486.96 and 155,578.68 is: 214,709.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,426 : 381,486.96 = 155,578.68 : x
  2. Step 2: Convert to fraction form
    276,426/381,486.96 = 155,578.68/x
  3. Step 3: Cross multiply
    276,426x = 381,486.96 × 155,578.68
  4. Step 4: Simplify right side
    276,426x = 59,351,237,674.01
  5. Step 5: Solve for x
    x = 59,351,237,674.01/276,426
  6. Step 6: Final answer
    x = 214,709.32

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1.5x scale

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.