Home / 686,403.32-1,029,539.36-420,026.72

Finding the Fourth Proportional to 686,403.32, 1,029,539.36 and 420,026.72

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Solution

The fourth proportional to 686,403.32, 1,029,539.36 and 420,026.72 is: 629,999.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,403.32 : 1,029,539.36 = 420,026.72 : x
  2. Step 2: Convert to fraction form
    686,403.32/1,029,539.36 = 420,026.72/x
  3. Step 3: Cross multiply
    686,403.32x = 1,029,539.36 × 420,026.72
  4. Step 4: Simplify right side
    686,403.32x = 432,434,036,394.07
  5. Step 5: Solve for x
    x = 432,434,036,394.07/686,403.32
  6. Step 6: Final answer
    x = 629,999.92

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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.