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Finding the Fourth Proportional to 469,989.57, 648,586.43 and 255,129.78

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Solution

The fourth proportional to 469,989.57, 648,586.43 and 255,129.78 is: 352,079.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    469,989.57 : 648,586.43 = 255,129.78 : x
  2. Step 2: Convert to fraction form
    469,989.57/648,586.43 = 255,129.78/x
  3. Step 3: Cross multiply
    469,989.57x = 648,586.43 × 255,129.78
  4. Step 4: Simplify right side
    469,989.57x = 165,473,713,834.71
  5. Step 5: Solve for x
    x = 165,473,713,834.71/469,989.57
  6. Step 6: Final answer
    x = 352,079.54

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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.