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Finding the Fourth Proportional to 276,409.60, 381,452.76 and 155,555.20

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Solution

The fourth proportional to 276,409.60, 381,452.76 and 155,555.20 is: 214,670.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,409.60 : 381,452.76 = 155,555.20 : x
  2. Step 2: Convert to fraction form
    276,409.60/381,452.76 = 155,555.20/x
  3. Step 3: Cross multiply
    276,409.60x = 381,452.76 × 155,555.20
  4. Step 4: Simplify right side
    276,409.60x = 59,336,960,372.35
  5. Step 5: Solve for x
    x = 59,336,960,372.35/276,409.60
  6. Step 6: Final answer
    x = 214,670.40

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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.