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Finding the Fourth Proportional to 709,031.44, 978,942.48 and 545,397.36

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Solution

The fourth proportional to 709,031.44, 978,942.48 and 545,397.36 is: 753,016.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,031.44 : 978,942.48 = 545,397.36 : x
  2. Step 2: Convert to fraction form
    709,031.44/978,942.48 = 545,397.36/x
  3. Step 3: Cross multiply
    709,031.44x = 978,942.48 × 545,397.36
  4. Step 4: Simplify right side
    709,031.44x = 533,912,644,183.85
  5. Step 5: Solve for x
    x = 533,912,644,183.85/709,031.44
  6. Step 6: Final answer
    x = 753,016.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.