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Finding the Fourth Proportional to 405,302.54, 607,952.84 and 380,640.36

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Solution

The fourth proportional to 405,302.54, 607,952.84 and 380,640.36 is: 570,959.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,302.54 : 607,952.84 = 380,640.36 : x
  2. Step 2: Convert to fraction form
    405,302.54/607,952.84 = 380,640.36/x
  3. Step 3: Cross multiply
    405,302.54x = 607,952.84 × 380,640.36
  4. Step 4: Simplify right side
    405,302.54x = 231,411,387,880.62
  5. Step 5: Solve for x
    x = 231,411,387,880.62/405,302.54
  6. Step 6: Final answer
    x = 570,959.63

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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.