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Finding the Fourth Proportional to 499,610.48, 689,420.60 and 281,807.12

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Solution

The fourth proportional to 499,610.48, 689,420.60 and 281,807.12 is: 388,870.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,610.48 : 689,420.60 = 281,807.12 : x
  2. Step 2: Convert to fraction form
    499,610.48/689,420.60 = 281,807.12/x
  3. Step 3: Cross multiply
    499,610.48x = 689,420.60 × 281,807.12
  4. Step 4: Simplify right side
    499,610.48x = 194,283,633,754.67
  5. Step 5: Solve for x
    x = 194,283,633,754.67/499,610.48
  6. Step 6: Final answer
    x = 388,870.21

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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.