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Finding the Fourth Proportional to 455,903.60, 683,855.40 and 140,457.20

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Solution

The fourth proportional to 455,903.60, 683,855.40 and 140,457.20 is: 210,685.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,903.60 : 683,855.40 = 140,457.20 : x
  2. Step 2: Convert to fraction form
    455,903.60/683,855.40 = 140,457.20/x
  3. Step 3: Cross multiply
    455,903.60x = 683,855.40 × 140,457.20
  4. Step 4: Simplify right side
    455,903.60x = 96,052,414,688.88
  5. Step 5: Solve for x
    x = 96,052,414,688.88/455,903.60
  6. Step 6: Final answer
    x = 210,685.80

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Similar ratio
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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.