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Finding the Fourth Proportional to 328,086.60, 492,129.90 and 221,798.40

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Solution

The fourth proportional to 328,086.60, 492,129.90 and 221,798.40 is: 332,697.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,086.60 : 492,129.90 = 221,798.40 : x
  2. Step 2: Convert to fraction form
    328,086.60/492,129.90 = 221,798.40/x
  3. Step 3: Cross multiply
    328,086.60x = 492,129.90 × 221,798.40
  4. Step 4: Simplify right side
    328,086.60x = 109,153,624,412.16
  5. Step 5: Solve for x
    x = 109,153,624,412.16/328,086.60
  6. Step 6: Final answer
    x = 332,697.60

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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.