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Finding the Fourth Proportional to 499,602.20, 689,449.84 and 281,810.15

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Solution

The fourth proportional to 499,602.20, 689,449.84 and 281,810.15 is: 388,897.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,602.20 : 689,449.84 = 281,810.15 : x
  2. Step 2: Convert to fraction form
    499,602.20/689,449.84 = 281,810.15/x
  3. Step 3: Cross multiply
    499,602.20x = 689,449.84 × 281,810.15
  4. Step 4: Simplify right side
    499,602.20x = 194,293,958,676.10
  5. Step 5: Solve for x
    x = 194,293,958,676.10/499,602.20
  6. Step 6: Final answer
    x = 388,897.32

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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.