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Finding the Fourth Proportional to 487,218.43, 730,819.57 and 145,662.64

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Solution

The fourth proportional to 487,218.43, 730,819.57 and 145,662.64 is: 218,491.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,218.43 : 730,819.57 = 145,662.64 : x
  2. Step 2: Convert to fraction form
    487,218.43/730,819.57 = 145,662.64/x
  3. Step 3: Cross multiply
    487,218.43x = 730,819.57 × 145,662.64
  4. Step 4: Simplify right side
    487,218.43x = 106,453,106,421.45
  5. Step 5: Solve for x
    x = 106,453,106,421.45/487,218.43
  6. Step 6: Final answer
    x = 218,491.54

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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.