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Finding the Fourth Proportional to 680,989.07, 939,771.45 and 375,072.39

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Solution

The fourth proportional to 680,989.07, 939,771.45 and 375,072.39 is: 517,603.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,989.07 : 939,771.45 = 375,072.39 : x
  2. Step 2: Convert to fraction form
    680,989.07/939,771.45 = 375,072.39/x
  3. Step 3: Cross multiply
    680,989.07x = 939,771.45 × 375,072.39
  4. Step 4: Simplify right side
    680,989.07x = 352,482,323,805.27
  5. Step 5: Solve for x
    x = 352,482,323,805.27/680,989.07
  6. Step 6: Final answer
    x = 517,603.49

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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.