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Finding the Fourth Proportional to 315,012.96, 434,650.32 and 187,730.64

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Solution

The fourth proportional to 315,012.96, 434,650.32 and 187,730.64 is: 259,028.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,012.96 : 434,650.32 = 187,730.64 : x
  2. Step 2: Convert to fraction form
    315,012.96/434,650.32 = 187,730.64/x
  3. Step 3: Cross multiply
    315,012.96x = 434,650.32 × 187,730.64
  4. Step 4: Simplify right side
    315,012.96x = 81,597,182,749.80
  5. Step 5: Solve for x
    x = 81,597,182,749.80/315,012.96
  6. Step 6: Final answer
    x = 259,028.02

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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.