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Finding the Fourth Proportional to 438,333.74, 657,502.45 and 139,024.57

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Solution

The fourth proportional to 438,333.74, 657,502.45 and 139,024.57 is: 208,537.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,333.74 : 657,502.45 = 139,024.57 : x
  2. Step 2: Convert to fraction form
    438,333.74/657,502.45 = 139,024.57/x
  3. Step 3: Cross multiply
    438,333.74x = 657,502.45 × 139,024.57
  4. Step 4: Simplify right side
    438,333.74x = 91,408,994,626.70
  5. Step 5: Solve for x
    x = 91,408,994,626.70/438,333.74
  6. Step 6: Final answer
    x = 208,537.43

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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.