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Finding the Fourth Proportional to 405,884.40, 607,660.20 and 248,420.40

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Solution

The fourth proportional to 405,884.40, 607,660.20 and 248,420.40 is: 371,916.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,884.40 : 607,660.20 = 248,420.40 : x
  2. Step 2: Convert to fraction form
    405,884.40/607,660.20 = 248,420.40/x
  3. Step 3: Cross multiply
    405,884.40x = 607,660.20 × 248,420.40
  4. Step 4: Simplify right side
    405,884.40x = 150,955,189,948.08
  5. Step 5: Solve for x
    x = 150,955,189,948.08/405,884.40
  6. Step 6: Final answer
    x = 371,916.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.