Home / 642,638.40-963,289.14-215,857.50

Finding the Fourth Proportional to 642,638.40, 963,289.14 and 215,857.50

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Solution

The fourth proportional to 642,638.40, 963,289.14 and 215,857.50 is: 323,561.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,638.40 : 963,289.14 = 215,857.50 : x
  2. Step 2: Convert to fraction form
    642,638.40/963,289.14 = 215,857.50/x
  3. Step 3: Cross multiply
    642,638.40x = 963,289.14 × 215,857.50
  4. Step 4: Simplify right side
    642,638.40x = 207,933,185,537.55
  5. Step 5: Solve for x
    x = 207,933,185,537.55/642,638.40
  6. Step 6: Final answer
    x = 323,561.72

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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.