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Finding the Fourth Proportional to 678,659.22, 1,017,978.30 and 166,329.36

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Solution

The fourth proportional to 678,659.22, 1,017,978.30 and 166,329.36 is: 249,491.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,659.22 : 1,017,978.30 = 166,329.36 : x
  2. Step 2: Convert to fraction form
    678,659.22/1,017,978.30 = 166,329.36/x
  3. Step 3: Cross multiply
    678,659.22x = 1,017,978.30 × 166,329.36
  4. Step 4: Simplify right side
    678,659.22x = 169,319,679,132.89
  5. Step 5: Solve for x
    x = 169,319,679,132.89/678,659.22
  6. Step 6: Final answer
    x = 249,491.46

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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.