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Finding the Fourth Proportional to 469,674.75, 648,488.18 and 288,629.43

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Solution

The fourth proportional to 469,674.75, 648,488.18 and 288,629.43 is: 398,515.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    469,674.75 : 648,488.18 = 288,629.43 : x
  2. Step 2: Convert to fraction form
    469,674.75/648,488.18 = 288,629.43/x
  3. Step 3: Cross multiply
    469,674.75x = 648,488.18 × 288,629.43
  4. Step 4: Simplify right side
    469,674.75x = 187,172,770,421.34
  5. Step 5: Solve for x
    x = 187,172,770,421.34/469,674.75
  6. Step 6: Final answer
    x = 398,515.72

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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.