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Finding the Fourth Proportional to 642,366.67, 886,495.03 and 355,886.75

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Solution

The fourth proportional to 642,366.67, 886,495.03 and 355,886.75 is: 491,139.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,366.67 : 886,495.03 = 355,886.75 : x
  2. Step 2: Convert to fraction form
    642,366.67/886,495.03 = 355,886.75/x
  3. Step 3: Cross multiply
    642,366.67x = 886,495.03 × 355,886.75
  4. Step 4: Simplify right side
    642,366.67x = 315,491,835,117.85
  5. Step 5: Solve for x
    x = 315,491,835,117.85/642,366.67
  6. Step 6: Final answer
    x = 491,139.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.