Home / 438,497.20-657,918.60-172,212.40

Finding the Fourth Proportional to 438,497.20, 657,918.60 and 172,212.40

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Solution

The fourth proportional to 438,497.20, 657,918.60 and 172,212.40 is: 258,386.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,497.20 : 657,918.60 = 172,212.40 : x
  2. Step 2: Convert to fraction form
    438,497.20/657,918.60 = 172,212.40/x
  3. Step 3: Cross multiply
    438,497.20x = 657,918.60 × 172,212.40
  4. Step 4: Simplify right side
    438,497.20x = 113,301,741,110.64
  5. Step 5: Solve for x
    x = 113,301,741,110.64/438,497.20
  6. Step 6: Final answer
    x = 258,386.46

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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.