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Finding the Fourth Proportional to 611,364.72, 916,628.76 and 311,264.56

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Solution

The fourth proportional to 611,364.72, 916,628.76 and 311,264.56 is: 466,683.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,364.72 : 916,628.76 = 311,264.56 : x
  2. Step 2: Convert to fraction form
    611,364.72/916,628.76 = 311,264.56/x
  3. Step 3: Cross multiply
    611,364.72x = 916,628.76 × 311,264.56
  4. Step 4: Simplify right side
    611,364.72x = 285,314,047,664.75
  5. Step 5: Solve for x
    x = 285,314,047,664.75/611,364.72
  6. Step 6: Final answer
    x = 466,683.86

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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.