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Finding the Fourth Proportional to 438,700.72, 658,074.42 and 139,204.74

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Solution

The fourth proportional to 438,700.72, 658,074.42 and 139,204.74 is: 208,814.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,700.72 : 658,074.42 = 139,204.74 : x
  2. Step 2: Convert to fraction form
    438,700.72/658,074.42 = 139,204.74/x
  3. Step 3: Cross multiply
    438,700.72x = 658,074.42 × 139,204.74
  4. Step 4: Simplify right side
    438,700.72x = 91,607,078,536.75
  5. Step 5: Solve for x
    x = 91,607,078,536.75/438,700.72
  6. Step 6: Final answer
    x = 208,814.52

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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.