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Finding the Fourth Proportional to 343,335.40, 515,424.30 and 216,975.40

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Solution

The fourth proportional to 343,335.40, 515,424.30 and 216,975.40 is: 325,729.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,335.40 : 515,424.30 = 216,975.40 : x
  2. Step 2: Convert to fraction form
    343,335.40/515,424.30 = 216,975.40/x
  3. Step 3: Cross multiply
    343,335.40x = 515,424.30 × 216,975.40
  4. Step 4: Simplify right side
    343,335.40x = 111,834,393,662.22
  5. Step 5: Solve for x
    x = 111,834,393,662.22/343,335.40
  6. Step 6: Final answer
    x = 325,729.28

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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.