Home / 1,059,638.40-1,588,228.80-428,137.60

Finding the Fourth Proportional to 1,059,638.40, 1,588,228.80 and 428,137.60

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Solution

The fourth proportional to 1,059,638.40, 1,588,228.80 and 428,137.60 is: 641,709.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,059,638.40 : 1,588,228.80 = 428,137.60 : x
  2. Step 2: Convert to fraction form
    1,059,638.40/1,588,228.80 = 428,137.60/x
  3. Step 3: Cross multiply
    1,059,638.40x = 1,588,228.80 × 428,137.60
  4. Step 4: Simplify right side
    1,059,638.40x = 679,980,466,682.88
  5. Step 5: Solve for x
    x = 679,980,466,682.88/1,059,638.40
  6. Step 6: Final answer
    x = 641,709.91

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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.