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Finding the Fourth Proportional to 438,421.96, 657,652.08 and 138,924.61

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Solution

The fourth proportional to 438,421.96, 657,652.08 and 138,924.61 is: 208,392.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,421.96 : 657,652.08 = 138,924.61 : x
  2. Step 2: Convert to fraction form
    438,421.96/657,652.08 = 138,924.61/x
  3. Step 3: Cross multiply
    438,421.96x = 657,652.08 × 138,924.61
  4. Step 4: Simplify right side
    438,421.96x = 91,364,058,729.69
  5. Step 5: Solve for x
    x = 91,364,058,729.69/438,421.96
  6. Step 6: Final answer
    x = 208,392.98

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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.