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Finding the Fourth Proportional to 343,496.62, 515,185.80 and 90,779.86

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Solution

The fourth proportional to 343,496.62, 515,185.80 and 90,779.86 is: 136,154.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,496.62 : 515,185.80 = 90,779.86 : x
  2. Step 2: Convert to fraction form
    343,496.62/515,185.80 = 90,779.86/x
  3. Step 3: Cross multiply
    343,496.62x = 515,185.80 × 90,779.86
  4. Step 4: Simplify right side
    343,496.62x = 46,768,494,797.99
  5. Step 5: Solve for x
    x = 46,768,494,797.99/343,496.62
  6. Step 6: Final answer
    x = 136,154.16

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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.