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Finding the Fourth Proportional to 289,665.87, 399,716.91 and 162,316.86

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Solution

The fourth proportional to 289,665.87, 399,716.91 and 162,316.86 is: 223,984.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,665.87 : 399,716.91 = 162,316.86 : x
  2. Step 2: Convert to fraction form
    289,665.87/399,716.91 = 162,316.86/x
  3. Step 3: Cross multiply
    289,665.87x = 399,716.91 × 162,316.86
  4. Step 4: Simplify right side
    289,665.87x = 64,880,793,720.10
  5. Step 5: Solve for x
    x = 64,880,793,720.10/289,665.87
  6. Step 6: Final answer
    x = 223,984.94

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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.