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Finding the Fourth Proportional to 388,087.80, 535,272.48 and 342,685.68

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Solution

The fourth proportional to 388,087.80, 535,272.48 and 342,685.68 is: 472,651.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,087.80 : 535,272.48 = 342,685.68 : x
  2. Step 2: Convert to fraction form
    388,087.80/535,272.48 = 342,685.68/x
  3. Step 3: Cross multiply
    388,087.80x = 535,272.48 × 342,685.68
  4. Step 4: Simplify right side
    388,087.80x = 183,430,213,794.09
  5. Step 5: Solve for x
    x = 183,430,213,794.09/388,087.80
  6. Step 6: Final answer
    x = 472,651.33

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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.