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Finding the Fourth Proportional to 328,979.80, 493,469.70 and 210,881.80

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Solution

The fourth proportional to 328,979.80, 493,469.70 and 210,881.80 is: 316,322.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,979.80 : 493,469.70 = 210,881.80 : x
  2. Step 2: Convert to fraction form
    328,979.80/493,469.70 = 210,881.80/x
  3. Step 3: Cross multiply
    328,979.80x = 493,469.70 × 210,881.80
  4. Step 4: Simplify right side
    328,979.80x = 104,063,778,581.46
  5. Step 5: Solve for x
    x = 104,063,778,581.46/328,979.80
  6. Step 6: Final answer
    x = 316,322.70

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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.