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Finding the Fourth Proportional to 253,779.16, 380,669.02 and 76,286.15

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Solution

The fourth proportional to 253,779.16, 380,669.02 and 76,286.15 is: 114,429.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,779.16 : 380,669.02 = 76,286.15 : x
  2. Step 2: Convert to fraction form
    253,779.16/380,669.02 = 76,286.15/x
  3. Step 3: Cross multiply
    253,779.16x = 380,669.02 × 76,286.15
  4. Step 4: Simplify right side
    253,779.16x = 29,039,775,434.78
  5. Step 5: Solve for x
    x = 29,039,775,434.78/253,779.16
  6. Step 6: Final answer
    x = 114,429.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.