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Finding the Fourth Proportional to 488,310.40, 732,028.20 and 319,911.40

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Solution

The fourth proportional to 488,310.40, 732,028.20 and 319,911.40 is: 479,580.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,310.40 : 732,028.20 = 319,911.40 : x
  2. Step 2: Convert to fraction form
    488,310.40/732,028.20 = 319,911.40/x
  3. Step 3: Cross multiply
    488,310.40x = 732,028.20 × 319,911.40
  4. Step 4: Simplify right side
    488,310.40x = 234,184,166,301.48
  5. Step 5: Solve for x
    x = 234,184,166,301.48/488,310.40
  6. Step 6: Final answer
    x = 479,580.54

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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.