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Finding the Fourth Proportional to 328,071.60, 492,107.40 and 221,783.40

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Solution

The fourth proportional to 328,071.60, 492,107.40 and 221,783.40 is: 332,675.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,071.60 : 492,107.40 = 221,783.40 : x
  2. Step 2: Convert to fraction form
    328,071.60/492,107.40 = 221,783.40/x
  3. Step 3: Cross multiply
    328,071.60x = 492,107.40 × 221,783.40
  4. Step 4: Simplify right side
    328,071.60x = 109,141,252,337.16
  5. Step 5: Solve for x
    x = 109,141,252,337.16/328,071.60
  6. Step 6: Final answer
    x = 332,675.10

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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.