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Finding the Fourth Proportional to 276,070.67, 380,981.44 and 155,205.20

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Solution

The fourth proportional to 276,070.67, 380,981.44 and 155,205.20 is: 214,185.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,070.67 : 380,981.44 = 155,205.20 : x
  2. Step 2: Convert to fraction form
    276,070.67/380,981.44 = 155,205.20/x
  3. Step 3: Cross multiply
    276,070.67x = 380,981.44 × 155,205.20
  4. Step 4: Simplify right side
    276,070.67x = 59,130,300,591.49
  5. Step 5: Solve for x
    x = 59,130,300,591.49/276,070.67
  6. Step 6: Final answer
    x = 214,185.38

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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.