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Finding the Fourth Proportional to 343,886.90, 515,830.35 and 217,915.70

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Solution

The fourth proportional to 343,886.90, 515,830.35 and 217,915.70 is: 326,873.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,886.90 : 515,830.35 = 217,915.70 : x
  2. Step 2: Convert to fraction form
    343,886.90/515,830.35 = 217,915.70/x
  3. Step 3: Cross multiply
    343,886.90x = 515,830.35 × 217,915.70
  4. Step 4: Simplify right side
    343,886.90x = 112,407,531,801.50
  5. Step 5: Solve for x
    x = 112,407,531,801.50/343,886.90
  6. Step 6: Final answer
    x = 326,873.55

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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.