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Finding the Fourth Proportional to 620,720.70, 930,994.65 and 200,039.10

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Solution

The fourth proportional to 620,720.70, 930,994.65 and 200,039.10 is: 300,030.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,720.70 : 930,994.65 = 200,039.10 : x
  2. Step 2: Convert to fraction form
    620,720.70/930,994.65 = 200,039.10/x
  3. Step 3: Cross multiply
    620,720.70x = 930,994.65 × 200,039.10
  4. Step 4: Simplify right side
    620,720.70x = 186,235,331,890.82
  5. Step 5: Solve for x
    x = 186,235,331,890.82/620,720.70
  6. Step 6: Final answer
    x = 300,030.81

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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.