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Finding the Fourth Proportional to 352,435.40, 486,361.40 and 191,290.50

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Solution

The fourth proportional to 352,435.40, 486,361.40 and 191,290.50 is: 263,981.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,435.40 : 486,361.40 = 191,290.50 : x
  2. Step 2: Convert to fraction form
    352,435.40/486,361.40 = 191,290.50/x
  3. Step 3: Cross multiply
    352,435.40x = 486,361.40 × 191,290.50
  4. Step 4: Simplify right side
    352,435.40x = 93,036,314,430.25
  5. Step 5: Solve for x
    x = 93,036,314,430.25/352,435.40
  6. Step 6: Final answer
    x = 263,981.19

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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.