Home / 438,268.72-657,501.60-138,767.20

Finding the Fourth Proportional to 438,268.72, 657,501.60 and 138,767.20

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Solution

The fourth proportional to 438,268.72, 657,501.60 and 138,767.20 is: 208,181.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,268.72 : 657,501.60 = 138,767.20 : x
  2. Step 2: Convert to fraction form
    438,268.72/657,501.60 = 138,767.20/x
  3. Step 3: Cross multiply
    438,268.72x = 657,501.60 × 138,767.20
  4. Step 4: Simplify right side
    438,268.72x = 91,239,656,027.52
  5. Step 5: Solve for x
    x = 91,239,656,027.52/438,268.72
  6. Step 6: Final answer
    x = 208,181.99

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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.