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Finding the Third Proportional to 358,903 and 557,317.50

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Solution

The third proportional to 358,903 and 557,317.50 is: 865,422.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,903 : 557,317.50 = 557,317.50 : x
  2. Step 2: Convert to fraction form
    358,903/557,317.50 = 557,317.50/x
  3. Step 3: Cross multiply
    358,903x = 557,317.50 × 557,317.50
  4. Step 4: Simplify right side
    358,903x = 310,602,795,806.25
  5. Step 5: Solve for x
    x = 310,602,795,806.25/358,903
  6. Step 6: Final answer
    x = 865,422.68

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.