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Finding the Fourth Proportional to 377,281.28, 520,384.34 and 256,212.20

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Solution

The fourth proportional to 377,281.28, 520,384.34 and 256,212.20 is: 353,393.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    377,281.28 : 520,384.34 = 256,212.20 : x
  2. Step 2: Convert to fraction form
    377,281.28/520,384.34 = 256,212.20/x
  3. Step 3: Cross multiply
    377,281.28x = 520,384.34 × 256,212.20
  4. Step 4: Simplify right side
    377,281.28x = 133,328,813,995.03
  5. Step 5: Solve for x
    x = 133,328,813,995.03/377,281.28
  6. Step 6: Final answer
    x = 353,393.67

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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.