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Finding the Fourth Proportional to 365,666.74, 548,401.83 and 128,978.26

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Solution

The fourth proportional to 365,666.74, 548,401.83 and 128,978.26 is: 193,432.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    365,666.74 : 548,401.83 = 128,978.26 : x
  2. Step 2: Convert to fraction form
    365,666.74/548,401.83 = 128,978.26/x
  3. Step 3: Cross multiply
    365,666.74x = 548,401.83 × 128,978.26
  4. Step 4: Simplify right side
    365,666.74x = 70,731,913,814.22
  5. Step 5: Solve for x
    x = 70,731,913,814.22/365,666.74
  6. Step 6: Final answer
    x = 193,432.72

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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.