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Finding the Fourth Proportional to 706,220, 974,583.60 and 388,268

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Solution

The fourth proportional to 706,220, 974,583.60 and 388,268 is: 535,809.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    706,220 : 974,583.60 = 388,268 : x
  2. Step 2: Convert to fraction form
    706,220/974,583.60 = 388,268/x
  3. Step 3: Cross multiply
    706,220x = 974,583.60 × 388,268
  4. Step 4: Simplify right side
    706,220x = 378,399,625,204.80
  5. Step 5: Solve for x
    x = 378,399,625,204.80/706,220
  6. Step 6: Final answer
    x = 535,809.84

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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.