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Finding the Fourth Proportional to 555,617.78, 766,756.21 and 300,968.96

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Solution

The fourth proportional to 555,617.78, 766,756.21 and 300,968.96 is: 415,339.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,617.78 : 766,756.21 = 300,968.96 : x
  2. Step 2: Convert to fraction form
    555,617.78/766,756.21 = 300,968.96/x
  3. Step 3: Cross multiply
    555,617.78x = 766,756.21 × 300,968.96
  4. Step 4: Simplify right side
    555,617.78x = 230,769,819,097.24
  5. Step 5: Solve for x
    x = 230,769,819,097.24/555,617.78
  6. Step 6: Final answer
    x = 415,339.16

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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.