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Finding the Fourth Proportional to 612,531, 919,059.84 and 212,953.95

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Solution

The fourth proportional to 612,531, 919,059.84 and 212,953.95 is: 319,522.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,531 : 919,059.84 = 212,953.95 : x
  2. Step 2: Convert to fraction form
    612,531/919,059.84 = 212,953.95/x
  3. Step 3: Cross multiply
    612,531x = 919,059.84 × 212,953.95
  4. Step 4: Simplify right side
    612,531x = 195,717,423,214.37
  5. Step 5: Solve for x
    x = 195,717,423,214.37/612,531
  6. Step 6: Final answer
    x = 319,522.48

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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.