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Finding the Fourth Proportional to 455,420.72, 627,089.34 and 412,701.32

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Solution

The fourth proportional to 455,420.72, 627,089.34 and 412,701.32 is: 568,267.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,420.72 : 627,089.34 = 412,701.32 : x
  2. Step 2: Convert to fraction form
    455,420.72/627,089.34 = 412,701.32/x
  3. Step 3: Cross multiply
    455,420.72x = 627,089.34 × 412,701.32
  4. Step 4: Simplify right side
    455,420.72x = 258,800,598,375.93
  5. Step 5: Solve for x
    x = 258,800,598,375.93/455,420.72
  6. Step 6: Final answer
    x = 568,267.07

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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.