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Finding the Fourth Proportional to 491,779.32, 678,720.12 and 276,961.38

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Solution

The fourth proportional to 491,779.32, 678,720.12 and 276,961.38 is: 382,243.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,779.32 : 678,720.12 = 276,961.38 : x
  2. Step 2: Convert to fraction form
    491,779.32/678,720.12 = 276,961.38/x
  3. Step 3: Cross multiply
    491,779.32x = 678,720.12 × 276,961.38
  4. Step 4: Simplify right side
    491,779.32x = 187,979,261,068.97
  5. Step 5: Solve for x
    x = 187,979,261,068.97/491,779.32
  6. Step 6: Final answer
    x = 382,243.12

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1.5x scale

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.