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Finding the Fourth Proportional to 491,888.45, 678,854.48 and 287,927.01

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Solution

The fourth proportional to 491,888.45, 678,854.48 and 287,927.01 is: 397,367.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,888.45 : 678,854.48 = 287,927.01 : x
  2. Step 2: Convert to fraction form
    491,888.45/678,854.48 = 287,927.01/x
  3. Step 3: Cross multiply
    491,888.45x = 678,854.48 × 287,927.01
  4. Step 4: Simplify right side
    491,888.45x = 195,460,539,211.87
  5. Step 5: Solve for x
    x = 195,460,539,211.87/491,888.45
  6. Step 6: Final answer
    x = 397,367.62

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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.