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Finding the Fourth Proportional to 328,979.20, 493,699.20 and 210,937.60

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Solution

The fourth proportional to 328,979.20, 493,699.20 and 210,937.60 is: 316,554.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,979.20 : 493,699.20 = 210,937.60 : x
  2. Step 2: Convert to fraction form
    328,979.20/493,699.20 = 210,937.60/x
  3. Step 3: Cross multiply
    328,979.20x = 493,699.20 × 210,937.60
  4. Step 4: Simplify right side
    328,979.20x = 104,139,724,369.92
  5. Step 5: Solve for x
    x = 104,139,724,369.92/328,979.20
  6. Step 6: Final answer
    x = 316,554.13

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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.