Home / 1,186,689.72-1,779,837.84-428,385.90

Finding the Fourth Proportional to 1,186,689.72, 1,779,837.84 and 428,385.90

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Solution

The fourth proportional to 1,186,689.72, 1,779,837.84 and 428,385.90 is: 642,507.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,186,689.72 : 1,779,837.84 = 428,385.90 : x
  2. Step 2: Convert to fraction form
    1,186,689.72/1,779,837.84 = 428,385.90/x
  3. Step 3: Cross multiply
    1,186,689.72x = 1,779,837.84 × 428,385.90
  4. Step 4: Simplify right side
    1,186,689.72x = 762,457,434,942.46
  5. Step 5: Solve for x
    x = 762,457,434,942.46/1,186,689.72
  6. Step 6: Final answer
    x = 642,507.83

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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.