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Finding the Fourth Proportional to 631,874.40, 945,968.40 and 613,442.40

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Solution

The fourth proportional to 631,874.40, 945,968.40 and 613,442.40 is: 918,374.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,874.40 : 945,968.40 = 613,442.40 : x
  2. Step 2: Convert to fraction form
    631,874.40/945,968.40 = 613,442.40/x
  3. Step 3: Cross multiply
    631,874.40x = 945,968.40 × 613,442.40
  4. Step 4: Simplify right side
    631,874.40x = 580,297,125,620.16
  5. Step 5: Solve for x
    x = 580,297,125,620.16/631,874.40
  6. Step 6: Final answer
    x = 918,374.17

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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.