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Finding the Fourth Proportional to 388,357.81, 535,825.50 and 250,478.39

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Solution

The fourth proportional to 388,357.81, 535,825.50 and 250,478.39 is: 345,590.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,357.81 : 535,825.50 = 250,478.39 : x
  2. Step 2: Convert to fraction form
    388,357.81/535,825.50 = 250,478.39/x
  3. Step 3: Cross multiply
    388,357.81x = 535,825.50 × 250,478.39
  4. Step 4: Simplify right side
    388,357.81x = 134,212,708,961.22
  5. Step 5: Solve for x
    x = 134,212,708,961.22/388,357.81
  6. Step 6: Final answer
    x = 345,590.35

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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.