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Finding the Fourth Proportional to 290,370.15, 400,697.79 and 161,317.67

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Solution

The fourth proportional to 290,370.15, 400,697.79 and 161,317.67 is: 222,611.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,370.15 : 400,697.79 = 161,317.67 : x
  2. Step 2: Convert to fraction form
    290,370.15/400,697.79 = 161,317.67/x
  3. Step 3: Cross multiply
    290,370.15x = 400,697.79 × 161,317.67
  4. Step 4: Simplify right side
    290,370.15x = 64,639,634,409.86
  5. Step 5: Solve for x
    x = 64,639,634,409.86/290,370.15
  6. Step 6: Final answer
    x = 222,611.15

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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.