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Finding the Fourth Proportional to 660,898.21, 911,824.16 and 385,193.15

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Solution

The fourth proportional to 660,898.21, 911,824.16 and 385,193.15 is: 531,441.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,898.21 : 911,824.16 = 385,193.15 : x
  2. Step 2: Convert to fraction form
    660,898.21/911,824.16 = 385,193.15/x
  3. Step 3: Cross multiply
    660,898.21x = 911,824.16 × 385,193.15
  4. Step 4: Simplify right side
    660,898.21x = 351,228,418,056.32
  5. Step 5: Solve for x
    x = 351,228,418,056.32/660,898.21
  6. Step 6: Final answer
    x = 531,441.02

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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.