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Finding the Fourth Proportional to 611,484.46, 917,389.34 and 212,124.60

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Solution

The fourth proportional to 611,484.46, 917,389.34 and 212,124.60 is: 318,243.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,484.46 : 917,389.34 = 212,124.60 : x
  2. Step 2: Convert to fraction form
    611,484.46/917,389.34 = 212,124.60/x
  3. Step 3: Cross multiply
    611,484.46x = 917,389.34 × 212,124.60
  4. Step 4: Simplify right side
    611,484.46x = 194,600,846,791.76
  5. Step 5: Solve for x
    x = 194,600,846,791.76/611,484.46
  6. Step 6: Final answer
    x = 318,243.32

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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.