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Finding the Fourth Proportional to 665,562.40, 998,999.70 and 328,983.10

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Solution

The fourth proportional to 665,562.40, 998,999.70 and 328,983.10 is: 493,798.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,562.40 : 998,999.70 = 328,983.10 : x
  2. Step 2: Convert to fraction form
    665,562.40/998,999.70 = 328,983.10/x
  3. Step 3: Cross multiply
    665,562.40x = 998,999.70 × 328,983.10
  4. Step 4: Simplify right side
    665,562.40x = 328,654,018,205.07
  5. Step 5: Solve for x
    x = 328,654,018,205.07/665,562.40
  6. Step 6: Final answer
    x = 493,798.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.