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Finding the Fourth Proportional to 289,377.28, 399,331.36 and 160,310.46

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Solution

The fourth proportional to 289,377.28, 399,331.36 and 160,310.46 is: 221,223.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,377.28 : 399,331.36 = 160,310.46 : x
  2. Step 2: Convert to fraction form
    289,377.28/399,331.36 = 160,310.46/x
  3. Step 3: Cross multiply
    289,377.28x = 399,331.36 × 160,310.46
  4. Step 4: Simplify right side
    289,377.28x = 64,016,994,014.03
  5. Step 5: Solve for x
    x = 64,016,994,014.03/289,377.28
  6. Step 6: Final answer
    x = 221,223.29

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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.