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Finding the Fourth Proportional to 528,183, 728,930.21 and 298,742.40

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Solution

The fourth proportional to 528,183, 728,930.21 and 298,742.40 is: 412,285.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,183 : 728,930.21 = 298,742.40 : x
  2. Step 2: Convert to fraction form
    528,183/728,930.21 = 298,742.40/x
  3. Step 3: Cross multiply
    528,183x = 728,930.21 × 298,742.40
  4. Step 4: Simplify right side
    528,183x = 217,762,358,874.19
  5. Step 5: Solve for x
    x = 217,762,358,874.19/528,183
  6. Step 6: Final answer
    x = 412,285.82

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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.