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Finding the Fourth Proportional to 480,620.40, 720,930.60 and 125,670.30

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Solution

The fourth proportional to 480,620.40, 720,930.60 and 125,670.30 is: 188,505.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,620.40 : 720,930.60 = 125,670.30 : x
  2. Step 2: Convert to fraction form
    480,620.40/720,930.60 = 125,670.30/x
  3. Step 3: Cross multiply
    480,620.40x = 720,930.60 × 125,670.30
  4. Step 4: Simplify right side
    480,620.40x = 90,599,564,781.18
  5. Step 5: Solve for x
    x = 90,599,564,781.18/480,620.40
  6. Step 6: Final answer
    x = 188,505.45

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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.