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Finding the Fourth Proportional to 289,426.50, 399,409.80 and 168,650.64

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Solution

The fourth proportional to 289,426.50, 399,409.80 and 168,650.64 is: 232,738.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,426.50 : 399,409.80 = 168,650.64 : x
  2. Step 2: Convert to fraction form
    289,426.50/399,409.80 = 168,650.64/x
  3. Step 3: Cross multiply
    289,426.50x = 399,409.80 × 168,650.64
  4. Step 4: Simplify right side
    289,426.50x = 67,360,718,392.27
  5. Step 5: Solve for x
    x = 67,360,718,392.27/289,426.50
  6. Step 6: Final answer
    x = 232,738.60

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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.