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Finding the Fourth Proportional to 680,661.97, 939,277.82 and 374,678.60

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Solution

The fourth proportional to 680,661.97, 939,277.82 and 374,678.60 is: 517,036.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,661.97 : 939,277.82 = 374,678.60 : x
  2. Step 2: Convert to fraction form
    680,661.97/939,277.82 = 374,678.60/x
  3. Step 3: Cross multiply
    680,661.97x = 939,277.82 × 374,678.60
  4. Step 4: Simplify right side
    680,661.97x = 351,927,294,848.96
  5. Step 5: Solve for x
    x = 351,927,294,848.96/680,661.97
  6. Step 6: Final answer
    x = 517,036.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.