Home / 648,121.20-972,181.80-620,127.60

Finding the Fourth Proportional to 648,121.20, 972,181.80 and 620,127.60

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Solution

The fourth proportional to 648,121.20, 972,181.80 and 620,127.60 is: 930,191.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,121.20 : 972,181.80 = 620,127.60 : x
  2. Step 2: Convert to fraction form
    648,121.20/972,181.80 = 620,127.60/x
  3. Step 3: Cross multiply
    648,121.20x = 972,181.80 × 620,127.60
  4. Step 4: Simplify right side
    648,121.20x = 602,876,766,397.68
  5. Step 5: Solve for x
    x = 602,876,766,397.68/648,121.20
  6. Step 6: Final answer
    x = 930,191.40

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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.