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Finding the Third Proportional to 358,128 and 558,987.75

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Solution

The third proportional to 358,128 and 558,987.75 is: 872,501.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,128 : 558,987.75 = 558,987.75 : x
  2. Step 2: Convert to fraction form
    358,128/558,987.75 = 558,987.75/x
  3. Step 3: Cross multiply
    358,128x = 558,987.75 × 558,987.75
  4. Step 4: Simplify right side
    358,128x = 312,467,304,650.06
  5. Step 5: Solve for x
    x = 312,467,304,650.06/358,128
  6. Step 6: Final answer
    x = 872,501.74

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.