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Finding the Fourth Proportional to 628,810, 867,707.98 and 356,877.88

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Solution

The fourth proportional to 628,810, 867,707.98 and 356,877.88 is: 492,463.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,810 : 867,707.98 = 356,877.88 : x
  2. Step 2: Convert to fraction form
    628,810/867,707.98 = 356,877.88/x
  3. Step 3: Cross multiply
    628,810x = 867,707.98 × 356,877.88
  4. Step 4: Simplify right side
    628,810x = 309,665,784,361.48
  5. Step 5: Solve for x
    x = 309,665,784,361.48/628,810
  6. Step 6: Final answer
    x = 492,463.20

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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.