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Finding the Fourth Proportional to 388,007.55, 535,446.55 and 215,922.58

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Solution

The fourth proportional to 388,007.55, 535,446.55 and 215,922.58 is: 297,971.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,007.55 : 535,446.55 = 215,922.58 : x
  2. Step 2: Convert to fraction form
    388,007.55/535,446.55 = 215,922.58/x
  3. Step 3: Cross multiply
    388,007.55x = 535,446.55 × 215,922.58
  4. Step 4: Simplify right side
    388,007.55x = 115,615,000,528.10
  5. Step 5: Solve for x
    x = 115,615,000,528.10/388,007.55
  6. Step 6: Final answer
    x = 297,971.01

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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.