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Finding the Fourth Proportional to 455,135.70, 636,009 and 455,135.70

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Solution

The fourth proportional to 455,135.70, 636,009 and 455,135.70 is: 636,009

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,135.70 : 636,009 = 455,135.70 : x
  2. Step 2: Convert to fraction form
    455,135.70/636,009 = 455,135.70/x
  3. Step 3: Cross multiply
    455,135.70x = 636,009 × 455,135.70
  4. Step 4: Simplify right side
    455,135.70x = 289,470,401,421.30
  5. Step 5: Solve for x
    x = 289,470,401,421.30/455,135.70
  6. Step 6: Final answer
    x = 636,009

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.