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Finding the Fourth Proportional to 664,999.60, 997,499.40 and 399,060.40

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Solution

The fourth proportional to 664,999.60, 997,499.40 and 399,060.40 is: 598,590.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,999.60 : 997,499.40 = 399,060.40 : x
  2. Step 2: Convert to fraction form
    664,999.60/997,499.40 = 399,060.40/x
  3. Step 3: Cross multiply
    664,999.60x = 997,499.40 × 399,060.40
  4. Step 4: Simplify right side
    664,999.60x = 398,062,509,563.76
  5. Step 5: Solve for x
    x = 398,062,509,563.76/664,999.60
  6. Step 6: Final answer
    x = 598,590.60

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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.