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Finding the Fourth Proportional to 450,991.40, 622,378.18 and 257,395.25

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Solution

The fourth proportional to 450,991.40, 622,378.18 and 257,395.25 is: 355,211.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,991.40 : 622,378.18 = 257,395.25 : x
  2. Step 2: Convert to fraction form
    450,991.40/622,378.18 = 257,395.25/x
  3. Step 3: Cross multiply
    450,991.40x = 622,378.18 × 257,395.25
  4. Step 4: Simplify right side
    450,991.40x = 160,197,185,948.67
  5. Step 5: Solve for x
    x = 160,197,185,948.67/450,991.40
  6. Step 6: Final answer
    x = 355,211.18

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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.