Home / 890,291.20-1,335,038.64-639,922.72

Finding the Fourth Proportional to 890,291.20, 1,335,038.64 and 639,922.72

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Solution

The fourth proportional to 890,291.20, 1,335,038.64 and 639,922.72 is: 959,597.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,291.20 : 1,335,038.64 = 639,922.72 : x
  2. Step 2: Convert to fraction form
    890,291.20/1,335,038.64 = 639,922.72/x
  3. Step 3: Cross multiply
    890,291.20x = 1,335,038.64 × 639,922.72
  4. Step 4: Simplify right side
    890,291.20x = 854,321,557,813.90
  5. Step 5: Solve for x
    x = 854,321,557,813.90/890,291.20
  6. Step 6: Final answer
    x = 959,597.89

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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.