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Finding the Fourth Proportional to 520,039.40, 779,670.30 and 220,274.60

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Solution

The fourth proportional to 520,039.40, 779,670.30 and 220,274.60 is: 330,247.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,039.40 : 779,670.30 = 220,274.60 : x
  2. Step 2: Convert to fraction form
    520,039.40/779,670.30 = 220,274.60/x
  3. Step 3: Cross multiply
    520,039.40x = 779,670.30 × 220,274.60
  4. Step 4: Simplify right side
    520,039.40x = 171,741,563,464.38
  5. Step 5: Solve for x
    x = 171,741,563,464.38/520,039.40
  6. Step 6: Final answer
    x = 330,247.21

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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.