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Finding the Fourth Proportional to 611,487.29, 917,393.60 and 212,127.41

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Solution

The fourth proportional to 611,487.29, 917,393.60 and 212,127.41 is: 318,247.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,487.29 : 917,393.60 = 212,127.41 : x
  2. Step 2: Convert to fraction form
    611,487.29/917,393.60 = 212,127.41/x
  3. Step 3: Cross multiply
    611,487.29x = 917,393.60 × 212,127.41
  4. Step 4: Simplify right side
    611,487.29x = 194,604,328,318.58
  5. Step 5: Solve for x
    x = 194,604,328,318.58/611,487.29
  6. Step 6: Final answer
    x = 318,247.54

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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.