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Finding the Fourth Proportional to 487,272.40, 730,900.80 and 145,716.64

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Solution

The fourth proportional to 487,272.40, 730,900.80 and 145,716.64 is: 218,572.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,272.40 : 730,900.80 = 145,716.64 : x
  2. Step 2: Convert to fraction form
    487,272.40/730,900.80 = 145,716.64/x
  3. Step 3: Cross multiply
    487,272.40x = 730,900.80 × 145,716.64
  4. Step 4: Simplify right side
    487,272.40x = 106,504,408,749.31
  5. Step 5: Solve for x
    x = 106,504,408,749.31/487,272.40
  6. Step 6: Final answer
    x = 218,572.63

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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.