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Finding the Fourth Proportional to 455,470.20, 683,270.10 and 139,879.80

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Solution

The fourth proportional to 455,470.20, 683,270.10 and 139,879.80 is: 209,839.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,470.20 : 683,270.10 = 139,879.80 : x
  2. Step 2: Convert to fraction form
    455,470.20/683,270.10 = 139,879.80/x
  3. Step 3: Cross multiply
    455,470.20x = 683,270.10 × 139,879.80
  4. Step 4: Simplify right side
    455,470.20x = 95,575,684,933.98
  5. Step 5: Solve for x
    x = 95,575,684,933.98/455,470.20
  6. Step 6: Final answer
    x = 209,839.60

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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.