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Finding the Fourth Proportional to 343,889.40, 515,834.10 and 217,918.20

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Solution

The fourth proportional to 343,889.40, 515,834.10 and 217,918.20 is: 326,877.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,889.40 : 515,834.10 = 217,918.20 : x
  2. Step 2: Convert to fraction form
    343,889.40/515,834.10 = 217,918.20/x
  3. Step 3: Cross multiply
    343,889.40x = 515,834.10 × 217,918.20
  4. Step 4: Simplify right side
    343,889.40x = 112,409,638,570.62
  5. Step 5: Solve for x
    x = 112,409,638,570.62/343,889.40
  6. Step 6: Final answer
    x = 326,877.30

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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.