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Finding the Fourth Proportional to 587,109.20, 810,403.08 and 345,379.28

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Solution

The fourth proportional to 587,109.20, 810,403.08 and 345,379.28 is: 476,736.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    587,109.20 : 810,403.08 = 345,379.28 : x
  2. Step 2: Convert to fraction form
    587,109.20/810,403.08 = 345,379.28/x
  3. Step 3: Cross multiply
    587,109.20x = 810,403.08 × 345,379.28
  4. Step 4: Simplify right side
    587,109.20x = 279,896,432,280.18
  5. Step 5: Solve for x
    x = 279,896,432,280.18/587,109.20
  6. Step 6: Final answer
    x = 476,736.58

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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.