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Finding the Fourth Proportional to 415,808.30, 624,004.05 and 266,411.90

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Solution

The fourth proportional to 415,808.30, 624,004.05 and 266,411.90 is: 399,804.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,808.30 : 624,004.05 = 266,411.90 : x
  2. Step 2: Convert to fraction form
    415,808.30/624,004.05 = 266,411.90/x
  3. Step 3: Cross multiply
    415,808.30x = 624,004.05 × 266,411.90
  4. Step 4: Simplify right side
    415,808.30x = 166,242,104,568.20
  5. Step 5: Solve for x
    x = 166,242,104,568.20/415,808.30
  6. Step 6: Final answer
    x = 399,804.68

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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.