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Finding the Fourth Proportional to 405,975.80, 608,906.10 and 125,521.40

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Solution

The fourth proportional to 405,975.80, 608,906.10 and 125,521.40 is: 188,264.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,975.80 : 608,906.10 = 125,521.40 : x
  2. Step 2: Convert to fraction form
    405,975.80/608,906.10 = 125,521.40/x
  3. Step 3: Cross multiply
    405,975.80x = 608,906.10 × 125,521.40
  4. Step 4: Simplify right side
    405,975.80x = 76,430,746,140.54
  5. Step 5: Solve for x
    x = 76,430,746,140.54/405,975.80
  6. Step 6: Final answer
    x = 188,264.29

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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.