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Finding the Fourth Proportional to 657,987.76, 987,017.69 and 208,676.10

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Solution

The fourth proportional to 657,987.76, 987,017.69 and 208,676.10 is: 313,025.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,987.76 : 987,017.69 = 208,676.10 : x
  2. Step 2: Convert to fraction form
    657,987.76/987,017.69 = 208,676.10/x
  3. Step 3: Cross multiply
    657,987.76x = 987,017.69 × 208,676.10
  4. Step 4: Simplify right side
    657,987.76x = 205,967,002,180.21
  5. Step 5: Solve for x
    x = 205,967,002,180.21/657,987.76
  6. Step 6: Final answer
    x = 313,025.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.