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Finding the Fourth Proportional to 499,656.60, 689,580.54 and 318,534.12

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Solution

The fourth proportional to 499,656.60, 689,580.54 and 318,534.12 is: 439,611.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,656.60 : 689,580.54 = 318,534.12 : x
  2. Step 2: Convert to fraction form
    499,656.60/689,580.54 = 318,534.12/x
  3. Step 3: Cross multiply
    499,656.60x = 689,580.54 × 318,534.12
  4. Step 4: Simplify right side
    499,656.60x = 219,654,930,478.03
  5. Step 5: Solve for x
    x = 219,654,930,478.03/499,656.60
  6. Step 6: Final answer
    x = 439,611.79

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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.