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Finding the Fourth Proportional to 328,980.20, 493,700.70 and 210,938.60

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Solution

The fourth proportional to 328,980.20, 493,700.70 and 210,938.60 is: 316,555.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,980.20 : 493,700.70 = 210,938.60 : x
  2. Step 2: Convert to fraction form
    328,980.20/493,700.70 = 210,938.60/x
  3. Step 3: Cross multiply
    328,980.20x = 493,700.70 × 210,938.60
  4. Step 4: Simplify right side
    328,980.20x = 104,140,534,477.02
  5. Step 5: Solve for x
    x = 104,140,534,477.02/328,980.20
  6. Step 6: Final answer
    x = 316,555.63

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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.