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Finding the Fourth Proportional to 380,416.55, 524,990.66 and 210,650.67

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Solution

The fourth proportional to 380,416.55, 524,990.66 and 210,650.67 is: 290,706.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,416.55 : 524,990.66 = 210,650.67 : x
  2. Step 2: Convert to fraction form
    380,416.55/524,990.66 = 210,650.67/x
  3. Step 3: Cross multiply
    380,416.55x = 524,990.66 × 210,650.67
  4. Step 4: Simplify right side
    380,416.55x = 110,589,633,219.49
  5. Step 5: Solve for x
    x = 110,589,633,219.49/380,416.55
  6. Step 6: Final answer
    x = 290,706.69

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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.