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Finding the Fourth Proportional to 863,056.80, 1,293,491.70 and 329,866.20

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Solution

The fourth proportional to 863,056.80, 1,293,491.70 and 329,866.20 is: 494,381.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    863,056.80 : 1,293,491.70 = 329,866.20 : x
  2. Step 2: Convert to fraction form
    863,056.80/1,293,491.70 = 329,866.20/x
  3. Step 3: Cross multiply
    863,056.80x = 1,293,491.70 × 329,866.20
  4. Step 4: Simplify right side
    863,056.80x = 426,679,191,810.54
  5. Step 5: Solve for x
    x = 426,679,191,810.54/863,056.80
  6. Step 6: Final answer
    x = 494,381.36

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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.