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Finding the Fourth Proportional to 628,963.30, 867,853.98 and 370,921.18

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Solution

The fourth proportional to 628,963.30, 867,853.98 and 370,921.18 is: 511,803.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,963.30 : 867,853.98 = 370,921.18 : x
  2. Step 2: Convert to fraction form
    628,963.30/867,853.98 = 370,921.18/x
  3. Step 3: Cross multiply
    628,963.30x = 867,853.98 × 370,921.18
  4. Step 4: Simplify right side
    628,963.30x = 321,905,422,329.30
  5. Step 5: Solve for x
    x = 321,905,422,329.30/628,963.30
  6. Step 6: Final answer
    x = 511,803.19

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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.