Home / 438,428.48-657,661.82-138,931.12

Finding the Fourth Proportional to 438,428.48, 657,661.82 and 138,931.12

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Solution

The fourth proportional to 438,428.48, 657,661.82 and 138,931.12 is: 208,402.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,428.48 : 657,661.82 = 138,931.12 : x
  2. Step 2: Convert to fraction form
    438,428.48/657,661.82 = 138,931.12/x
  3. Step 3: Cross multiply
    438,428.48x = 657,661.82 × 138,931.12
  4. Step 4: Simplify right side
    438,428.48x = 91,369,693,233.84
  5. Step 5: Solve for x
    x = 91,369,693,233.84/438,428.48
  6. Step 6: Final answer
    x = 208,402.73

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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.