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Finding the Fourth Proportional to 391,334.40, 587,001.60 and 346,233.60

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Solution

The fourth proportional to 391,334.40, 587,001.60 and 346,233.60 is: 519,350.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,334.40 : 587,001.60 = 346,233.60 : x
  2. Step 2: Convert to fraction form
    391,334.40/587,001.60 = 346,233.60/x
  3. Step 3: Cross multiply
    391,334.40x = 587,001.60 × 346,233.60
  4. Step 4: Simplify right side
    391,334.40x = 203,239,677,173.76
  5. Step 5: Solve for x
    x = 203,239,677,173.76/391,334.40
  6. Step 6: Final answer
    x = 519,350.40

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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.