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Finding the Fourth Proportional to 770,388.60, 1,155,248.15 and 365,696.78

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Solution

The fourth proportional to 770,388.60, 1,155,248.15 and 365,696.78 is: 548,386.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    770,388.60 : 1,155,248.15 = 365,696.78 : x
  2. Step 2: Convert to fraction form
    770,388.60/1,155,248.15 = 365,696.78/x
  3. Step 3: Cross multiply
    770,388.60x = 1,155,248.15 × 365,696.78
  4. Step 4: Simplify right side
    770,388.60x = 422,470,534,102.68
  5. Step 5: Solve for x
    x = 422,470,534,102.68/770,388.60
  6. Step 6: Final answer
    x = 548,386.27

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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.