Home / 438,259.10-657,390.60-138,741.18

Finding the Fourth Proportional to 438,259.10, 657,390.60 and 138,741.18

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Solution

The fourth proportional to 438,259.10, 657,390.60 and 138,741.18 is: 208,112.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,259.10 : 657,390.60 = 138,741.18 : x
  2. Step 2: Convert to fraction form
    438,259.10/657,390.60 = 138,741.18/x
  3. Step 3: Cross multiply
    438,259.10x = 657,390.60 × 138,741.18
  4. Step 4: Simplify right side
    438,259.10x = 91,207,147,564.91
  5. Step 5: Solve for x
    x = 91,207,147,564.91/438,259.10
  6. Step 6: Final answer
    x = 208,112.39

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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.