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Finding the Fourth Proportional to 258,268.49, 356,393.25 and 143,539.68

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Solution

The fourth proportional to 258,268.49, 356,393.25 and 143,539.68 is: 198,075.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,268.49 : 356,393.25 = 143,539.68 : x
  2. Step 2: Convert to fraction form
    258,268.49/356,393.25 = 143,539.68/x
  3. Step 3: Cross multiply
    258,268.49x = 356,393.25 × 143,539.68
  4. Step 4: Simplify right side
    258,268.49x = 51,156,573,059.16
  5. Step 5: Solve for x
    x = 51,156,573,059.16/258,268.49
  6. Step 6: Final answer
    x = 198,075.17

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1.5x scale

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.