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Finding the Fourth Proportional to 642,367.17, 886,495.72 and 355,887.25

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Solution

The fourth proportional to 642,367.17, 886,495.72 and 355,887.25 is: 491,140.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,367.17 : 886,495.72 = 355,887.25 : x
  2. Step 2: Convert to fraction form
    642,367.17/886,495.72 = 355,887.25/x
  3. Step 3: Cross multiply
    642,367.17x = 886,495.72 × 355,887.25
  4. Step 4: Simplify right side
    642,367.17x = 315,492,523,927.57
  5. Step 5: Solve for x
    x = 315,492,523,927.57/642,367.17
  6. Step 6: Final answer
    x = 491,140.49

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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.