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Finding the Fourth Proportional to 455,310.12, 683,066.70 and 139,798.92

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Solution

The fourth proportional to 455,310.12, 683,066.70 and 139,798.92 is: 209,729.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,310.12 : 683,066.70 = 139,798.92 : x
  2. Step 2: Convert to fraction form
    455,310.12/683,066.70 = 139,798.92/x
  3. Step 3: Cross multiply
    455,310.12x = 683,066.70 × 139,798.92
  4. Step 4: Simplify right side
    455,310.12x = 95,491,986,947.96
  5. Step 5: Solve for x
    x = 95,491,986,947.96/455,310.12
  6. Step 6: Final answer
    x = 209,729.55

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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.