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Finding the Fourth Proportional to 611,711.14, 917,575.94 and 212,364.60

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Solution

The fourth proportional to 611,711.14, 917,575.94 and 212,364.60 is: 318,550.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,711.14 : 917,575.94 = 212,364.60 : x
  2. Step 2: Convert to fraction form
    611,711.14/917,575.94 = 212,364.60/x
  3. Step 3: Cross multiply
    611,711.14x = 917,575.94 × 212,364.60
  4. Step 4: Simplify right side
    611,711.14x = 194,860,644,685.45
  5. Step 5: Solve for x
    x = 194,860,644,685.45/611,711.14
  6. Step 6: Final answer
    x = 318,550.10

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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.