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Finding the Fourth Proportional to 499,645.06, 689,735.34 and 318,600.34

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Solution

The fourth proportional to 499,645.06, 689,735.34 and 318,600.34 is: 439,812.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,645.06 : 689,735.34 = 318,600.34 : x
  2. Step 2: Convert to fraction form
    499,645.06/689,735.34 = 318,600.34/x
  3. Step 3: Cross multiply
    499,645.06x = 689,735.34 × 318,600.34
  4. Step 4: Simplify right side
    499,645.06x = 219,749,913,834.02
  5. Step 5: Solve for x
    x = 219,749,913,834.02/499,645.06
  6. Step 6: Final answer
    x = 439,812.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.