Home / 438,225.09-657,436.10-138,723.64

Finding the Fourth Proportional to 438,225.09, 657,436.10 and 138,723.64

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Solution

The fourth proportional to 438,225.09, 657,436.10 and 138,723.64 is: 208,116.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,225.09 : 657,436.10 = 138,723.64 : x
  2. Step 2: Convert to fraction form
    438,225.09/657,436.10 = 138,723.64/x
  3. Step 3: Cross multiply
    438,225.09x = 657,436.10 × 138,723.64
  4. Step 4: Simplify right side
    438,225.09x = 91,201,926,522.20
  5. Step 5: Solve for x
    x = 91,201,926,522.20/438,225.09
  6. Step 6: Final answer
    x = 208,116.63

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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.