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Finding the Fourth Proportional to 248,871.80, 373,307.70 and 209,991.80

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Solution

The fourth proportional to 248,871.80, 373,307.70 and 209,991.80 is: 314,987.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,871.80 : 373,307.70 = 209,991.80 : x
  2. Step 2: Convert to fraction form
    248,871.80/373,307.70 = 209,991.80/x
  3. Step 3: Cross multiply
    248,871.80x = 373,307.70 × 209,991.80
  4. Step 4: Simplify right side
    248,871.80x = 78,391,555,876.86
  5. Step 5: Solve for x
    x = 78,391,555,876.86/248,871.80
  6. Step 6: Final answer
    x = 314,987.70

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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.