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Finding the Fourth Proportional to 491,886.70, 678,852.06 and 287,925.26

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Solution

The fourth proportional to 491,886.70, 678,852.06 and 287,925.26 is: 397,365.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,886.70 : 678,852.06 = 287,925.26 : x
  2. Step 2: Convert to fraction form
    491,886.70/678,852.06 = 287,925.26/x
  3. Step 3: Cross multiply
    491,886.70x = 678,852.06 × 287,925.26
  4. Step 4: Simplify right side
    491,886.70x = 195,458,652,482.78
  5. Step 5: Solve for x
    x = 195,458,652,482.78/491,886.70
  6. Step 6: Final answer
    x = 397,365.20

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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.