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Finding the Fourth Proportional to 611,711.12, 917,575.91 and 212,364.59

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Solution

The fourth proportional to 611,711.12, 917,575.91 and 212,364.59 is: 318,550.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,711.12 : 917,575.91 = 212,364.59 : x
  2. Step 2: Convert to fraction form
    611,711.12/917,575.91 = 212,364.59/x
  3. Step 3: Cross multiply
    611,711.12x = 917,575.91 × 212,364.59
  4. Step 4: Simplify right side
    611,711.12x = 194,860,627,864.06
  5. Step 5: Solve for x
    x = 194,860,627,864.06/611,711.12
  6. Step 6: Final answer
    x = 318,550.08

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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.