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Finding the Fourth Proportional to 499,644.06, 689,733.96 and 318,599.34

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Solution

The fourth proportional to 499,644.06, 689,733.96 and 318,599.34 is: 439,810.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,644.06 : 689,733.96 = 318,599.34 : x
  2. Step 2: Convert to fraction form
    499,644.06/689,733.96 = 318,599.34/x
  3. Step 3: Cross multiply
    499,644.06x = 689,733.96 × 318,599.34
  4. Step 4: Simplify right side
    499,644.06x = 219,748,784,431.59
  5. Step 5: Solve for x
    x = 219,748,784,431.59/499,644.06
  6. Step 6: Final answer
    x = 439,810.66

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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.