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Finding the Fourth Proportional to 450,963.40, 621,606.80 and 305,724.72

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Solution

The fourth proportional to 450,963.40, 621,606.80 and 305,724.72 is: 421,410.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,963.40 : 621,606.80 = 305,724.72 : x
  2. Step 2: Convert to fraction form
    450,963.40/621,606.80 = 305,724.72/x
  3. Step 3: Cross multiply
    450,963.40x = 621,606.80 × 305,724.72
  4. Step 4: Simplify right side
    450,963.40x = 190,040,564,880.10
  5. Step 5: Solve for x
    x = 190,040,564,880.10/450,963.40
  6. Step 6: Final answer
    x = 421,410.17

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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.