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Finding the Fourth Proportional to 394,430.80, 591,646.20 and 347,774.80

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Solution

The fourth proportional to 394,430.80, 591,646.20 and 347,774.80 is: 521,662.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,430.80 : 591,646.20 = 347,774.80 : x
  2. Step 2: Convert to fraction form
    394,430.80/591,646.20 = 347,774.80/x
  3. Step 3: Cross multiply
    394,430.80x = 591,646.20 × 347,774.80
  4. Step 4: Simplify right side
    394,430.80x = 205,759,638,875.76
  5. Step 5: Solve for x
    x = 205,759,638,875.76/394,430.80
  6. Step 6: Final answer
    x = 521,662.20

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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.