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Finding the Fourth Proportional to 518,057.98, 777,617.01 and 427,813.25

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Solution

The fourth proportional to 518,057.98, 777,617.01 and 427,813.25 is: 642,157.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,057.98 : 777,617.01 = 427,813.25 : x
  2. Step 2: Convert to fraction form
    518,057.98/777,617.01 = 427,813.25/x
  3. Step 3: Cross multiply
    518,057.98x = 777,617.01 × 427,813.25
  4. Step 4: Simplify right side
    518,057.98x = 332,674,856,415.30
  5. Step 5: Solve for x
    x = 332,674,856,415.30/518,057.98
  6. Step 6: Final answer
    x = 642,157.58

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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.