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Finding the Fourth Proportional to 438,885.52, 657,943.72 and 211,066.94

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Solution

The fourth proportional to 438,885.52, 657,943.72 and 211,066.94 is: 316,415.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,885.52 : 657,943.72 = 211,066.94 : x
  2. Step 2: Convert to fraction form
    438,885.52/657,943.72 = 211,066.94/x
  3. Step 3: Cross multiply
    438,885.52x = 657,943.72 × 211,066.94
  4. Step 4: Simplify right side
    438,885.52x = 138,870,167,672.62
  5. Step 5: Solve for x
    x = 138,870,167,672.62/438,885.52
  6. Step 6: Final answer
    x = 316,415.47

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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.