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Finding the Fourth Proportional to 665,465.40, 998,975.70 and 660,799.80

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Solution

The fourth proportional to 665,465.40, 998,975.70 and 660,799.80 is: 991,971.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,465.40 : 998,975.70 = 660,799.80 : x
  2. Step 2: Convert to fraction form
    665,465.40/998,975.70 = 660,799.80/x
  3. Step 3: Cross multiply
    665,465.40x = 998,975.70 × 660,799.80
  4. Step 4: Simplify right side
    665,465.40x = 660,122,942,764.86
  5. Step 5: Solve for x
    x = 660,122,942,764.86/665,465.40
  6. Step 6: Final answer
    x = 991,971.85

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1.5x scale

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.