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Finding the Fourth Proportional to 343,421.40, 514,986.30 and 165,982.80

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Solution

The fourth proportional to 343,421.40, 514,986.30 and 165,982.80 is: 248,903.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,421.40 : 514,986.30 = 165,982.80 : x
  2. Step 2: Convert to fraction form
    343,421.40/514,986.30 = 165,982.80/x
  3. Step 3: Cross multiply
    343,421.40x = 514,986.30 × 165,982.80
  4. Step 4: Simplify right side
    343,421.40x = 85,478,868,035.64
  5. Step 5: Solve for x
    x = 85,478,868,035.64/343,421.40
  6. Step 6: Final answer
    x = 248,903.73

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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.