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Finding the Fourth Proportional to 827,406.40, 1,241,109.60 and 266,440.90

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Solution

The fourth proportional to 827,406.40, 1,241,109.60 and 266,440.90 is: 399,661.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    827,406.40 : 1,241,109.60 = 266,440.90 : x
  2. Step 2: Convert to fraction form
    827,406.40/1,241,109.60 = 266,440.90/x
  3. Step 3: Cross multiply
    827,406.40x = 1,241,109.60 × 266,440.90
  4. Step 4: Simplify right side
    827,406.40x = 330,682,358,822.64
  5. Step 5: Solve for x
    x = 330,682,358,822.64/827,406.40
  6. Step 6: Final answer
    x = 399,661.35

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1.5x scale

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.