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Finding the Fourth Proportional to 388,654.78, 536,477.76 and 227,561.56

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Solution

The fourth proportional to 388,654.78, 536,477.76 and 227,561.56 is: 314,113.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,654.78 : 536,477.76 = 227,561.56 : x
  2. Step 2: Convert to fraction form
    388,654.78/536,477.76 = 227,561.56/x
  3. Step 3: Cross multiply
    388,654.78x = 536,477.76 × 227,561.56
  4. Step 4: Simplify right side
    388,654.78x = 122,081,715,970.91
  5. Step 5: Solve for x
    x = 122,081,715,970.91/388,654.78
  6. Step 6: Final answer
    x = 314,113.51

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1.5x scale

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.