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Finding the Fourth Proportional to 556,639.67, 768,164.19 and 301,990.84

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Solution

The fourth proportional to 556,639.67, 768,164.19 and 301,990.84 is: 416,748.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,639.67 : 768,164.19 = 301,990.84 : x
  2. Step 2: Convert to fraction form
    556,639.67/768,164.19 = 301,990.84/x
  3. Step 3: Cross multiply
    556,639.67x = 768,164.19 × 301,990.84
  4. Step 4: Simplify right side
    556,639.67x = 231,978,548,996.02
  5. Step 5: Solve for x
    x = 231,978,548,996.02/556,639.67
  6. Step 6: Final answer
    x = 416,748.14

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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.