Home / 642,348.45-963,538.07-215,890.47

Finding the Fourth Proportional to 642,348.45, 963,538.07 and 215,890.47

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Solution

The fourth proportional to 642,348.45, 963,538.07 and 215,890.47 is: 323,840.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,348.45 : 963,538.07 = 215,890.47 : x
  2. Step 2: Convert to fraction form
    642,348.45/963,538.07 = 215,890.47/x
  3. Step 3: Cross multiply
    642,348.45x = 963,538.07 × 215,890.47
  4. Step 4: Simplify right side
    642,348.45x = 208,018,685,715.74
  5. Step 5: Solve for x
    x = 208,018,685,715.74/642,348.45
  6. Step 6: Final answer
    x = 323,840.88

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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.