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Finding the Fourth Proportional to 328,078.60, 492,117.90 and 221,790.40

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Solution

The fourth proportional to 328,078.60, 492,117.90 and 221,790.40 is: 332,685.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,078.60 : 492,117.90 = 221,790.40 : x
  2. Step 2: Convert to fraction form
    328,078.60/492,117.90 = 221,790.40/x
  3. Step 3: Cross multiply
    328,078.60x = 492,117.90 × 221,790.40
  4. Step 4: Simplify right side
    328,078.60x = 109,147,025,888.16
  5. Step 5: Solve for x
    x = 109,147,025,888.16/328,078.60
  6. Step 6: Final answer
    x = 332,685.60

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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.