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Finding the Fourth Proportional to 380,754.46, 525,439.74 and 210,988.45

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Solution

The fourth proportional to 380,754.46, 525,439.74 and 210,988.45 is: 291,163.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,754.46 : 525,439.74 = 210,988.45 : x
  2. Step 2: Convert to fraction form
    380,754.46/525,439.74 = 210,988.45/x
  3. Step 3: Cross multiply
    380,754.46x = 525,439.74 × 210,988.45
  4. Step 4: Simplify right side
    380,754.46x = 110,861,716,311.00
  5. Step 5: Solve for x
    x = 110,861,716,311.00/380,754.46
  6. Step 6: Final answer
    x = 291,163.28

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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.