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Finding the Fourth Proportional to 455,765.08, 628,422.32 and 310,656.77

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Solution

The fourth proportional to 455,765.08, 628,422.32 and 310,656.77 is: 428,342.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,765.08 : 628,422.32 = 310,656.77 : x
  2. Step 2: Convert to fraction form
    455,765.08/628,422.32 = 310,656.77/x
  3. Step 3: Cross multiply
    455,765.08x = 628,422.32 × 310,656.77
  4. Step 4: Simplify right side
    455,765.08x = 195,223,649,014.42
  5. Step 5: Solve for x
    x = 195,223,649,014.42/455,765.08
  6. Step 6: Final answer
    x = 428,342.71

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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.