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Finding the Fourth Proportional to 664,653.40, 996,980.10 and 265,355.80

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Solution

The fourth proportional to 664,653.40, 996,980.10 and 265,355.80 is: 398,033.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,653.40 : 996,980.10 = 265,355.80 : x
  2. Step 2: Convert to fraction form
    664,653.40/996,980.10 = 265,355.80/x
  3. Step 3: Cross multiply
    664,653.40x = 996,980.10 × 265,355.80
  4. Step 4: Simplify right side
    664,653.40x = 264,554,452,019.58
  5. Step 5: Solve for x
    x = 264,554,452,019.58/664,653.40
  6. Step 6: Final answer
    x = 398,033.70

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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.