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Finding the Fourth Proportional to 660,042.80, 988,897.80 and 618,052.40

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Solution

The fourth proportional to 660,042.80, 988,897.80 and 618,052.40 is: 925,986.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,042.80 : 988,897.80 = 618,052.40 : x
  2. Step 2: Convert to fraction form
    660,042.80/988,897.80 = 618,052.40/x
  3. Step 3: Cross multiply
    660,042.80x = 988,897.80 × 618,052.40
  4. Step 4: Simplify right side
    660,042.80x = 611,190,658,644.72
  5. Step 5: Solve for x
    x = 611,190,658,644.72/660,042.80
  6. Step 6: Final answer
    x = 925,986.40

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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.