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Finding the Fourth Proportional to 400,485.57, 600,818.34 and 134,239.28

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Solution

The fourth proportional to 400,485.57, 600,818.34 and 134,239.28 is: 201,389.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,485.57 : 600,818.34 = 134,239.28 : x
  2. Step 2: Convert to fraction form
    400,485.57/600,818.34 = 134,239.28/x
  3. Step 3: Cross multiply
    400,485.57x = 600,818.34 × 134,239.28
  4. Step 4: Simplify right side
    400,485.57x = 80,653,417,739.06
  5. Step 5: Solve for x
    x = 80,653,417,739.06/400,485.57
  6. Step 6: Final answer
    x = 201,389.08

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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.