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Finding the Fourth Proportional to 438,399.36, 657,650.88 and 138,893.76

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Solution

The fourth proportional to 438,399.36, 657,650.88 and 138,893.76 is: 208,357.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,399.36 : 657,650.88 = 138,893.76 : x
  2. Step 2: Convert to fraction form
    438,399.36/657,650.88 = 138,893.76/x
  3. Step 3: Cross multiply
    438,399.36x = 657,650.88 × 138,893.76
  4. Step 4: Simplify right side
    438,399.36x = 91,343,603,490.51
  5. Step 5: Solve for x
    x = 91,343,603,490.51/438,399.36
  6. Step 6: Final answer
    x = 208,357.06

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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.