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Finding the Fourth Proportional to 665,929.14, 998,583.15 and 345,995

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Solution

The fourth proportional to 665,929.14, 998,583.15 and 345,995 is: 518,831.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,929.14 : 998,583.15 = 345,995 : x
  2. Step 2: Convert to fraction form
    665,929.14/998,583.15 = 345,995/x
  3. Step 3: Cross multiply
    665,929.14x = 998,583.15 × 345,995
  4. Step 4: Simplify right side
    665,929.14x = 345,504,776,984.25
  5. Step 5: Solve for x
    x = 345,504,776,984.25/665,929.14
  6. Step 6: Final answer
    x = 518,831.14

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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.