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Finding the Fourth Proportional to 620,593,287.40, 930,889,931.10 and 211,662,778.60

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Solution

The fourth proportional to 620,593,287.40, 930,889,931.10 and 211,662,778.60 is: 317,494,167.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,593,287.40 : 930,889,931.10 = 211,662,778.60 : x
  2. Step 2: Convert to fraction form
    620,593,287.40/930,889,931.10 = 211,662,778.60/x
  3. Step 3: Cross multiply
    620,593,287.40x = 930,889,931.10 × 211,662,778.60
  4. Step 4: Simplify right side
    620,593,287.40x = 197,034,749,387,388,544
  5. Step 5: Solve for x
    x = 197,034,749,387,388,544/620,593,287.40
  6. Step 6: Final answer
    x = 317,494,167.90

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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.