Home / 865,638.42-1,298,048.95-505,912.47

Finding the Fourth Proportional to 865,638.42, 1,298,048.95 and 505,912.47

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Solution

The fourth proportional to 865,638.42, 1,298,048.95 and 505,912.47 is: 758,629.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,638.42 : 1,298,048.95 = 505,912.47 : x
  2. Step 2: Convert to fraction form
    865,638.42/1,298,048.95 = 505,912.47/x
  3. Step 3: Cross multiply
    865,638.42x = 1,298,048.95 × 505,912.47
  4. Step 4: Simplify right side
    865,638.42x = 656,699,150,475.41
  5. Step 5: Solve for x
    x = 656,699,150,475.41/865,638.42
  6. Step 6: Final answer
    x = 758,629.86

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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.