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Finding the Fourth Proportional to 347,457.28, 520,171.80 and 213,936.88

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Solution

The fourth proportional to 347,457.28, 520,171.80 and 213,936.88 is: 320,280.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,457.28 : 520,171.80 = 213,936.88 : x
  2. Step 2: Convert to fraction form
    347,457.28/520,171.80 = 213,936.88/x
  3. Step 3: Cross multiply
    347,457.28x = 520,171.80 × 213,936.88
  4. Step 4: Simplify right side
    347,457.28x = 111,283,931,955.98
  5. Step 5: Solve for x
    x = 111,283,931,955.98/347,457.28
  6. Step 6: Final answer
    x = 320,280.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.