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Finding the Fourth Proportional to 343,316.20, 515,319.90 and 165,965.80

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Solution

The fourth proportional to 343,316.20, 515,319.90 and 165,965.80 is: 249,115.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,316.20 : 515,319.90 = 165,965.80 : x
  2. Step 2: Convert to fraction form
    343,316.20/515,319.90 = 165,965.80/x
  3. Step 3: Cross multiply
    343,316.20x = 515,319.90 × 165,965.80
  4. Step 4: Simplify right side
    343,316.20x = 85,525,479,459.42
  5. Step 5: Solve for x
    x = 85,525,479,459.42/343,316.20
  6. Step 6: Final answer
    x = 249,115.77

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1.5x scale

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.