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Finding the Fourth Proportional to 660,047.80, 988,905.30 and 618,057.40

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Solution

The fourth proportional to 660,047.80, 988,905.30 and 618,057.40 is: 925,993.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,047.80 : 988,905.30 = 618,057.40 : x
  2. Step 2: Convert to fraction form
    660,047.80/988,905.30 = 618,057.40/x
  3. Step 3: Cross multiply
    660,047.80x = 988,905.30 × 618,057.40
  4. Step 4: Simplify right side
    660,047.80x = 611,200,238,564.22
  5. Step 5: Solve for x
    x = 611,200,238,564.22/660,047.80
  6. Step 6: Final answer
    x = 925,993.90

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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.