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Finding the Fourth Proportional to 662,021.80, 991,064.40 and 662,021.80

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Solution

The fourth proportional to 662,021.80, 991,064.40 and 662,021.80 is: 991,064.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,021.80 : 991,064.40 = 662,021.80 : x
  2. Step 2: Convert to fraction form
    662,021.80/991,064.40 = 662,021.80/x
  3. Step 3: Cross multiply
    662,021.80x = 991,064.40 × 662,021.80
  4. Step 4: Simplify right side
    662,021.80x = 656,106,238,003.92
  5. Step 5: Solve for x
    x = 656,106,238,003.92/662,021.80
  6. Step 6: Final answer
    x = 991,064.40

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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.