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Finding the Fourth Proportional to 418,989.63, 578,217.75 and 228,015.12

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Solution

The fourth proportional to 418,989.63, 578,217.75 and 228,015.12 is: 314,667.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,989.63 : 578,217.75 = 228,015.12 : x
  2. Step 2: Convert to fraction form
    418,989.63/578,217.75 = 228,015.12/x
  3. Step 3: Cross multiply
    418,989.63x = 578,217.75 × 228,015.12
  4. Step 4: Simplify right side
    418,989.63x = 131,842,389,652.38
  5. Step 5: Solve for x
    x = 131,842,389,652.38/418,989.63
  6. Step 6: Final answer
    x = 314,667.43

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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.