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Finding the Fourth Proportional to 357,990.12, 493,903.44 and 221,975.12

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Solution

The fourth proportional to 357,990.12, 493,903.44 and 221,975.12 is: 306,249.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,990.12 : 493,903.44 = 221,975.12 : x
  2. Step 2: Convert to fraction form
    357,990.12/493,903.44 = 221,975.12/x
  3. Step 3: Cross multiply
    357,990.12x = 493,903.44 × 221,975.12
  4. Step 4: Simplify right side
    357,990.12x = 109,634,275,362.41
  5. Step 5: Solve for x
    x = 109,634,275,362.41/357,990.12
  6. Step 6: Final answer
    x = 306,249.44

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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.