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Finding the Fourth Proportional to 420,750.32, 580,685.10 and 236,994.90

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Solution

The fourth proportional to 420,750.32, 580,685.10 and 236,994.90 is: 327,080.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,750.32 : 580,685.10 = 236,994.90 : x
  2. Step 2: Convert to fraction form
    420,750.32/580,685.10 = 236,994.90/x
  3. Step 3: Cross multiply
    420,750.32x = 580,685.10 × 236,994.90
  4. Step 4: Simplify right side
    420,750.32x = 137,619,407,205.99
  5. Step 5: Solve for x
    x = 137,619,407,205.99/420,750.32
  6. Step 6: Final answer
    x = 327,080.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.