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Finding the Fourth Proportional to 388,461.56, 582,832.26 and 135,779.22

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Solution

The fourth proportional to 388,461.56, 582,832.26 and 135,779.22 is: 203,717.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,461.56 : 582,832.26 = 135,779.22 : x
  2. Step 2: Convert to fraction form
    388,461.56/582,832.26 = 135,779.22/x
  3. Step 3: Cross multiply
    388,461.56x = 582,832.26 × 135,779.22
  4. Step 4: Simplify right side
    388,461.56x = 79,136,509,653.64
  5. Step 5: Solve for x
    x = 79,136,509,653.64/388,461.56
  6. Step 6: Final answer
    x = 203,717.74

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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.