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Finding the Fourth Proportional to 309,361.50, 426,918.90 and 175,225.50

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Solution

The fourth proportional to 309,361.50, 426,918.90 and 175,225.50 is: 241,811.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,361.50 : 426,918.90 = 175,225.50 : x
  2. Step 2: Convert to fraction form
    309,361.50/426,918.90 = 175,225.50/x
  3. Step 3: Cross multiply
    309,361.50x = 426,918.90 × 175,225.50
  4. Step 4: Simplify right side
    309,361.50x = 74,807,077,711.95
  5. Step 5: Solve for x
    x = 74,807,077,711.95/309,361.50
  6. Step 6: Final answer
    x = 241,811.21

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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.