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Finding the Fourth Proportional to 352,921, 487,030.98 and 193,945

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Solution

The fourth proportional to 352,921, 487,030.98 and 193,945 is: 267,644.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,921 : 487,030.98 = 193,945 : x
  2. Step 2: Convert to fraction form
    352,921/487,030.98 = 193,945/x
  3. Step 3: Cross multiply
    352,921x = 487,030.98 × 193,945
  4. Step 4: Simplify right side
    352,921x = 94,457,223,416.10
  5. Step 5: Solve for x
    x = 94,457,223,416.10/352,921
  6. Step 6: Final answer
    x = 267,644.10

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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.