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Finding the Fourth Proportional to 438,308.80, 657,488.20 and 122,790.31

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Solution

The fourth proportional to 438,308.80, 657,488.20 and 122,790.31 is: 184,192.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,308.80 : 657,488.20 = 122,790.31 : x
  2. Step 2: Convert to fraction form
    438,308.80/657,488.20 = 122,790.31/x
  3. Step 3: Cross multiply
    438,308.80x = 657,488.20 × 122,790.31
  4. Step 4: Simplify right side
    438,308.80x = 80,733,179,899.34
  5. Step 5: Solve for x
    x = 80,733,179,899.34/438,308.80
  6. Step 6: Final answer
    x = 184,192.47

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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.