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Finding the Fourth Proportional to 276,143.50, 381,075.65 and 155,282.21

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Solution

The fourth proportional to 276,143.50, 381,075.65 and 155,282.21 is: 214,288.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,143.50 : 381,075.65 = 155,282.21 : x
  2. Step 2: Convert to fraction form
    276,143.50/381,075.65 = 155,282.21/x
  3. Step 3: Cross multiply
    276,143.50x = 381,075.65 × 155,282.21
  4. Step 4: Simplify right side
    276,143.50x = 59,174,269,109.19
  5. Step 5: Solve for x
    x = 59,174,269,109.19/276,143.50
  6. Step 6: Final answer
    x = 214,288.11

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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.