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Finding the Fourth Proportional to 289,957.80, 434,418.30 and 248,485.80

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Solution

The fourth proportional to 289,957.80, 434,418.30 and 248,485.80 is: 372,284.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,957.80 : 434,418.30 = 248,485.80 : x
  2. Step 2: Convert to fraction form
    289,957.80/434,418.30 = 248,485.80/x
  3. Step 3: Cross multiply
    289,957.80x = 434,418.30 × 248,485.80
  4. Step 4: Simplify right side
    289,957.80x = 107,946,778,810.14
  5. Step 5: Solve for x
    x = 107,946,778,810.14/289,957.80
  6. Step 6: Final answer
    x = 372,284.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.