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Finding the Fourth Proportional to 455,969.40, 683,889.30 and 140,458.20

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Solution

The fourth proportional to 455,969.40, 683,889.30 and 140,458.20 is: 210,667.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,969.40 : 683,889.30 = 140,458.20 : x
  2. Step 2: Convert to fraction form
    455,969.40/683,889.30 = 140,458.20/x
  3. Step 3: Cross multiply
    455,969.40x = 683,889.30 × 140,458.20
  4. Step 4: Simplify right side
    455,969.40x = 96,057,860,077.26
  5. Step 5: Solve for x
    x = 96,057,860,077.26/455,969.40
  6. Step 6: Final answer
    x = 210,667.34

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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.