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Finding the Fourth Proportional to 258,626.70, 356,901.42 and 145,449.45

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Solution

The fourth proportional to 258,626.70, 356,901.42 and 145,449.45 is: 200,718.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,626.70 : 356,901.42 = 145,449.45 : x
  2. Step 2: Convert to fraction form
    258,626.70/356,901.42 = 145,449.45/x
  3. Step 3: Cross multiply
    258,626.70x = 356,901.42 × 145,449.45
  4. Step 4: Simplify right side
    258,626.70x = 51,911,115,243.22
  5. Step 5: Solve for x
    x = 51,911,115,243.22/258,626.70
  6. Step 6: Final answer
    x = 200,718.31

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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.