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Finding the Fourth Proportional to 306,057.40, 459,086.10 and 140,169.40

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Solution

The fourth proportional to 306,057.40, 459,086.10 and 140,169.40 is: 210,254.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,057.40 : 459,086.10 = 140,169.40 : x
  2. Step 2: Convert to fraction form
    306,057.40/459,086.10 = 140,169.40/x
  3. Step 3: Cross multiply
    306,057.40x = 459,086.10 × 140,169.40
  4. Step 4: Simplify right side
    306,057.40x = 64,349,823,185.34
  5. Step 5: Solve for x
    x = 64,349,823,185.34/306,057.40
  6. Step 6: Final answer
    x = 210,254.10

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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.