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Finding the Fourth Proportional to 659,999.80, 988,833.30 and 618,009.40

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Solution

The fourth proportional to 659,999.80, 988,833.30 and 618,009.40 is: 925,921.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,999.80 : 988,833.30 = 618,009.40 : x
  2. Step 2: Convert to fraction form
    659,999.80/988,833.30 = 618,009.40/x
  3. Step 3: Cross multiply
    659,999.80x = 988,833.30 × 618,009.40
  4. Step 4: Simplify right side
    659,999.80x = 611,108,274,433.02
  5. Step 5: Solve for x
    x = 611,108,274,433.02/659,999.80
  6. Step 6: Final answer
    x = 925,921.91

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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.