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Finding the Fourth Proportional to 660,309.40, 990,852.90 and 239,530.60

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Solution

The fourth proportional to 660,309.40, 990,852.90 and 239,530.60 is: 359,436.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,309.40 : 990,852.90 = 239,530.60 : x
  2. Step 2: Convert to fraction form
    660,309.40/990,852.90 = 239,530.60/x
  3. Step 3: Cross multiply
    660,309.40x = 990,852.90 × 239,530.60
  4. Step 4: Simplify right side
    660,309.40x = 237,339,589,648.74
  5. Step 5: Solve for x
    x = 237,339,589,648.74/660,309.40
  6. Step 6: Final answer
    x = 359,436.94

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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.