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Finding the Fourth Proportional to 306,078.60, 459,117.90 and 211,600.20

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Solution

The fourth proportional to 306,078.60, 459,117.90 and 211,600.20 is: 317,400.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,078.60 : 459,117.90 = 211,600.20 : x
  2. Step 2: Convert to fraction form
    306,078.60/459,117.90 = 211,600.20/x
  3. Step 3: Cross multiply
    306,078.60x = 459,117.90 × 211,600.20
  4. Step 4: Simplify right side
    306,078.60x = 97,149,439,463.58
  5. Step 5: Solve for x
    x = 97,149,439,463.58/306,078.60
  6. Step 6: Final answer
    x = 317,400.30

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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.