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Finding the Fourth Proportional to 388,654, 536,575.80 and 254,751.28

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Solution

The fourth proportional to 388,654, 536,575.80 and 254,751.28 is: 351,709.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,654 : 536,575.80 = 254,751.28 : x
  2. Step 2: Convert to fraction form
    388,654/536,575.80 = 254,751.28/x
  3. Step 3: Cross multiply
    388,654x = 536,575.80 × 254,751.28
  4. Step 4: Simplify right side
    388,654x = 136,693,371,867.02
  5. Step 5: Solve for x
    x = 136,693,371,867.02/388,654
  6. Step 6: Final answer
    x = 351,709.67

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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.