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Finding the Fourth Proportional to 516,715.61, 775,166.36 and 212,940.63

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Solution

The fourth proportional to 516,715.61, 775,166.36 and 212,940.63 is: 319,449.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    516,715.61 : 775,166.36 = 212,940.63 : x
  2. Step 2: Convert to fraction form
    516,715.61/775,166.36 = 212,940.63/x
  3. Step 3: Cross multiply
    516,715.61x = 775,166.36 × 212,940.63
  4. Step 4: Simplify right side
    516,715.61x = 165,064,411,988.50
  5. Step 5: Solve for x
    x = 165,064,411,988.50/516,715.61
  6. Step 6: Final answer
    x = 319,449.25

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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.