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Finding the Fourth Proportional to 659,708.40, 988,250.40 and 612,469.20

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Solution

The fourth proportional to 659,708.40, 988,250.40 and 612,469.20 is: 917,485.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,708.40 : 988,250.40 = 612,469.20 : x
  2. Step 2: Convert to fraction form
    659,708.40/988,250.40 = 612,469.20/x
  3. Step 3: Cross multiply
    659,708.40x = 988,250.40 × 612,469.20
  4. Step 4: Simplify right side
    659,708.40x = 605,272,931,887.68
  5. Step 5: Solve for x
    x = 605,272,931,887.68/659,708.40
  6. Step 6: Final answer
    x = 917,485.56

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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.