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Finding the Fourth Proportional to 520,116.48, 780,236.89 and 220,558.13

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Solution

The fourth proportional to 520,116.48, 780,236.89 and 220,558.13 is: 330,863.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,116.48 : 780,236.89 = 220,558.13 : x
  2. Step 2: Convert to fraction form
    520,116.48/780,236.89 = 220,558.13/x
  3. Step 3: Cross multiply
    520,116.48x = 780,236.89 × 220,558.13
  4. Step 4: Simplify right side
    520,116.48x = 172,087,590,814.61
  5. Step 5: Solve for x
    x = 172,087,590,814.61/520,116.48
  6. Step 6: Final answer
    x = 330,863.56

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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.