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Finding the Fourth Proportional to 659,063.40, 988,364.70 and 343,415.40

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Solution

The fourth proportional to 659,063.40, 988,364.70 and 343,415.40 is: 515,003.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,063.40 : 988,364.70 = 343,415.40 : x
  2. Step 2: Convert to fraction form
    659,063.40/988,364.70 = 343,415.40/x
  3. Step 3: Cross multiply
    659,063.40x = 988,364.70 × 343,415.40
  4. Step 4: Simplify right side
    659,063.40x = 339,419,658,796.38
  5. Step 5: Solve for x
    x = 339,419,658,796.38/659,063.40
  6. Step 6: Final answer
    x = 515,003.05

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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.