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Finding the Fourth Proportional to 543,071.40, 814,603.05 and 163,991.40

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Solution

The fourth proportional to 543,071.40, 814,603.05 and 163,991.40 is: 245,985.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,071.40 : 814,603.05 = 163,991.40 : x
  2. Step 2: Convert to fraction form
    543,071.40/814,603.05 = 163,991.40/x
  3. Step 3: Cross multiply
    543,071.40x = 814,603.05 × 163,991.40
  4. Step 4: Simplify right side
    543,071.40x = 133,587,894,613.77
  5. Step 5: Solve for x
    x = 133,587,894,613.77/543,071.40
  6. Step 6: Final answer
    x = 245,985.88

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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.