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Finding the Fourth Proportional to 492,628.36, 679,711.23 and 299,031.30

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Solution

The fourth proportional to 492,628.36, 679,711.23 and 299,031.30 is: 412,592.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,628.36 : 679,711.23 = 299,031.30 : x
  2. Step 2: Convert to fraction form
    492,628.36/679,711.23 = 299,031.30/x
  3. Step 3: Cross multiply
    492,628.36x = 679,711.23 × 299,031.30
  4. Step 4: Simplify right side
    492,628.36x = 203,254,932,731.50
  5. Step 5: Solve for x
    x = 203,254,932,731.50/492,628.36
  6. Step 6: Final answer
    x = 412,592.84

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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.