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Finding the Fourth Proportional to 438,597.63, 657,919.94 and 139,100.94

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Solution

The fourth proportional to 438,597.63, 657,919.94 and 139,100.94 is: 208,658.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,597.63 : 657,919.94 = 139,100.94 : x
  2. Step 2: Convert to fraction form
    438,597.63/657,919.94 = 139,100.94/x
  3. Step 3: Cross multiply
    438,597.63x = 657,919.94 × 139,100.94
  4. Step 4: Simplify right side
    438,597.63x = 91,517,281,403.24
  5. Step 5: Solve for x
    x = 91,517,281,403.24/438,597.63
  6. Step 6: Final answer
    x = 208,658.86

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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.