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Finding the Fourth Proportional to 455,418.86, 628,655.26 and 407,589.14

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Solution

The fourth proportional to 455,418.86, 628,655.26 and 407,589.14 is: 562,631.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,418.86 : 628,655.26 = 407,589.14 : x
  2. Step 2: Convert to fraction form
    455,418.86/628,655.26 = 407,589.14/x
  3. Step 3: Cross multiply
    455,418.86x = 628,655.26 × 407,589.14
  4. Step 4: Simplify right side
    455,418.86x = 256,233,056,779.88
  5. Step 5: Solve for x
    x = 256,233,056,779.88/455,418.86
  6. Step 6: Final answer
    x = 562,631.63

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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.