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Finding the Fourth Proportional to 289,499.64, 399,520.80 and 162,176.28

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Solution

The fourth proportional to 289,499.64, 399,520.80 and 162,176.28 is: 223,809.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,499.64 : 399,520.80 = 162,176.28 : x
  2. Step 2: Convert to fraction form
    289,499.64/399,520.80 = 162,176.28/x
  3. Step 3: Cross multiply
    289,499.64x = 399,520.80 × 162,176.28
  4. Step 4: Simplify right side
    289,499.64x = 64,792,797,126.62
  5. Step 5: Solve for x
    x = 64,792,797,126.62/289,499.64
  6. Step 6: Final answer
    x = 223,809.59

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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.