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Finding the Fourth Proportional to 289,423.50, 399,405.66 and 168,647.64

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Solution

The fourth proportional to 289,423.50, 399,405.66 and 168,647.64 is: 232,734.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,423.50 : 399,405.66 = 168,647.64 : x
  2. Step 2: Convert to fraction form
    289,423.50/399,405.66 = 168,647.64/x
  3. Step 3: Cross multiply
    289,423.50x = 399,405.66 × 168,647.64
  4. Step 4: Simplify right side
    289,423.50x = 67,358,821,961.64
  5. Step 5: Solve for x
    x = 67,358,821,961.64/289,423.50
  6. Step 6: Final answer
    x = 232,734.46

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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.