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Finding the Fourth Proportional to 405,782.84, 608,783.62 and 139,548.40

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Solution

The fourth proportional to 405,782.84, 608,783.62 and 139,548.40 is: 209,360.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,782.84 : 608,783.62 = 139,548.40 : x
  2. Step 2: Convert to fraction form
    405,782.84/608,783.62 = 139,548.40/x
  3. Step 3: Cross multiply
    405,782.84x = 608,783.62 × 139,548.40
  4. Step 4: Simplify right side
    405,782.84x = 84,954,780,117.21
  5. Step 5: Solve for x
    x = 84,954,780,117.21/405,782.84
  6. Step 6: Final answer
    x = 209,360.21

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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.