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Finding the Fourth Proportional to 328,028.60, 492,042.90 and 321,807.80

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Solution

The fourth proportional to 328,028.60, 492,042.90 and 321,807.80 is: 482,711.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,028.60 : 492,042.90 = 321,807.80 : x
  2. Step 2: Convert to fraction form
    328,028.60/492,042.90 = 321,807.80/x
  3. Step 3: Cross multiply
    328,028.60x = 492,042.90 × 321,807.80
  4. Step 4: Simplify right side
    328,028.60x = 158,343,243,154.62
  5. Step 5: Solve for x
    x = 158,343,243,154.62/328,028.60
  6. Step 6: Final answer
    x = 482,711.70

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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.