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Finding the Fourth Proportional to 343,903.40, 515,855.10 and 308,911.40

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Solution

The fourth proportional to 343,903.40, 515,855.10 and 308,911.40 is: 463,367.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,903.40 : 515,855.10 = 308,911.40 : x
  2. Step 2: Convert to fraction form
    343,903.40/515,855.10 = 308,911.40/x
  3. Step 3: Cross multiply
    343,903.40x = 515,855.10 × 308,911.40
  4. Step 4: Simplify right side
    343,903.40x = 159,353,521,138.14
  5. Step 5: Solve for x
    x = 159,353,521,138.14/343,903.40
  6. Step 6: Final answer
    x = 463,367.10

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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.