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Finding the Fourth Proportional to 387,426.98, 581,234.16 and 134,670.98

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Solution

The fourth proportional to 387,426.98, 581,234.16 and 134,670.98 is: 202,039.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,426.98 : 581,234.16 = 134,670.98 : x
  2. Step 2: Convert to fraction form
    387,426.98/581,234.16 = 134,670.98/x
  3. Step 3: Cross multiply
    387,426.98x = 581,234.16 × 134,670.98
  4. Step 4: Simplify right side
    387,426.98x = 78,275,373,936.68
  5. Step 5: Solve for x
    x = 78,275,373,936.68/387,426.98
  6. Step 6: Final answer
    x = 202,039.04

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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.