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Finding the Fourth Proportional to 660,671.21, 911,801.88 and 370,361.18

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Solution

The fourth proportional to 660,671.21, 911,801.88 and 370,361.18 is: 511,140.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,671.21 : 911,801.88 = 370,361.18 : x
  2. Step 2: Convert to fraction form
    660,671.21/911,801.88 = 370,361.18/x
  3. Step 3: Cross multiply
    660,671.21x = 911,801.88 × 370,361.18
  4. Step 4: Simplify right side
    660,671.21x = 337,696,015,644.01
  5. Step 5: Solve for x
    x = 337,696,015,644.01/660,671.21
  6. Step 6: Final answer
    x = 511,140.81

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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.