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Finding the Fourth Proportional to 368,638.30, 552,525.81 and 140,784.67

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Solution

The fourth proportional to 368,638.30, 552,525.81 and 140,784.67 is: 211,012.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,638.30 : 552,525.81 = 140,784.67 : x
  2. Step 2: Convert to fraction form
    368,638.30/552,525.81 = 140,784.67/x
  3. Step 3: Cross multiply
    368,638.30x = 552,525.81 × 140,784.67
  4. Step 4: Simplify right side
    368,638.30x = 77,787,163,827.33
  5. Step 5: Solve for x
    x = 77,787,163,827.33/368,638.30
  6. Step 6: Final answer
    x = 211,012.16

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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.