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Finding the Fourth Proportional to 680,835.78, 939,545.46 and 374,905.80

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Solution

The fourth proportional to 680,835.78, 939,545.46 and 374,905.80 is: 517,365.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,835.78 : 939,545.46 = 374,905.80 : x
  2. Step 2: Convert to fraction form
    680,835.78/939,545.46 = 374,905.80/x
  3. Step 3: Cross multiply
    680,835.78x = 939,545.46 × 374,905.80
  4. Step 4: Simplify right side
    680,835.78x = 352,241,042,317.67
  5. Step 5: Solve for x
    x = 352,241,042,317.67/680,835.78
  6. Step 6: Final answer
    x = 517,365.64

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1.5x scale

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.