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Finding the Fourth Proportional to 388,530.42, 582,888.93 and 148,640.39

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Solution

The fourth proportional to 388,530.42, 582,888.93 and 148,640.39 is: 222,996.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,530.42 : 582,888.93 = 148,640.39 : x
  2. Step 2: Convert to fraction form
    388,530.42/582,888.93 = 148,640.39/x
  3. Step 3: Cross multiply
    388,530.42x = 582,888.93 × 148,640.39
  4. Step 4: Simplify right side
    388,530.42x = 86,640,837,881.88
  5. Step 5: Solve for x
    x = 86,640,837,881.88/388,530.42
  6. Step 6: Final answer
    x = 222,996.28

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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.