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Finding the Fourth Proportional to 488,379.40, 732,131.70 and 319,980.40

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Solution

The fourth proportional to 488,379.40, 732,131.70 and 319,980.40 is: 479,684.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,379.40 : 732,131.70 = 319,980.40 : x
  2. Step 2: Convert to fraction form
    488,379.40/732,131.70 = 319,980.40/x
  3. Step 3: Cross multiply
    488,379.40x = 732,131.70 × 319,980.40
  4. Step 4: Simplify right side
    488,379.40x = 234,267,794,218.68
  5. Step 5: Solve for x
    x = 234,267,794,218.68/488,379.40
  6. Step 6: Final answer
    x = 479,684.02

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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.