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Finding the Fourth Proportional to 438,598.48, 657,980.84 and 139,154.44

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Solution

The fourth proportional to 438,598.48, 657,980.84 and 139,154.44 is: 208,758.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,598.48 : 657,980.84 = 139,154.44 : x
  2. Step 2: Convert to fraction form
    438,598.48/657,980.84 = 139,154.44/x
  3. Step 3: Cross multiply
    438,598.48x = 657,980.84 × 139,154.44
  4. Step 4: Simplify right side
    438,598.48x = 91,560,955,320.93
  5. Step 5: Solve for x
    x = 91,560,955,320.93/438,598.48
  6. Step 6: Final answer
    x = 208,758.03

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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.