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Finding the Fourth Proportional to 620,963.60, 931,664.10 and 305,209.40

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Solution

The fourth proportional to 620,963.60, 931,664.10 and 305,209.40 is: 457,921.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,963.60 : 931,664.10 = 305,209.40 : x
  2. Step 2: Convert to fraction form
    620,963.60/931,664.10 = 305,209.40/x
  3. Step 3: Cross multiply
    620,963.60x = 931,664.10 × 305,209.40
  4. Step 4: Simplify right side
    620,963.60x = 284,352,640,962.54
  5. Step 5: Solve for x
    x = 284,352,640,962.54/620,963.60
  6. Step 6: Final answer
    x = 457,921.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.