Home / 438,005.07-657,003.51-138,485.61

Finding the Fourth Proportional to 438,005.07, 657,003.51 and 138,485.61

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Solution

The fourth proportional to 438,005.07, 657,003.51 and 138,485.61 is: 207,727.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,005.07 : 657,003.51 = 138,485.61 : x
  2. Step 2: Convert to fraction form
    438,005.07/657,003.51 = 138,485.61/x
  3. Step 3: Cross multiply
    438,005.07x = 657,003.51 × 138,485.61
  4. Step 4: Simplify right side
    438,005.07x = 90,985,531,854.49
  5. Step 5: Solve for x
    x = 90,985,531,854.49/438,005.07
  6. Step 6: Final answer
    x = 207,727.12

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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.