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Finding the Fourth Proportional to 328,990.20, 493,715.70 and 210,948.60

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Solution

The fourth proportional to 328,990.20, 493,715.70 and 210,948.60 is: 316,570.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,990.20 : 493,715.70 = 210,948.60 : x
  2. Step 2: Convert to fraction form
    328,990.20/493,715.70 = 210,948.60/x
  3. Step 3: Cross multiply
    328,990.20x = 493,715.70 × 210,948.60
  4. Step 4: Simplify right side
    328,990.20x = 104,148,635,713.02
  5. Step 5: Solve for x
    x = 104,148,635,713.02/328,990.20
  6. Step 6: Final answer
    x = 316,570.63

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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.