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Finding the Fourth Proportional to 289,772.80, 434,140.80 and 248,300.80

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Solution

The fourth proportional to 289,772.80, 434,140.80 and 248,300.80 is: 372,006.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,772.80 : 434,140.80 = 248,300.80 : x
  2. Step 2: Convert to fraction form
    289,772.80/434,140.80 = 248,300.80/x
  3. Step 3: Cross multiply
    289,772.80x = 434,140.80 × 248,300.80
  4. Step 4: Simplify right side
    289,772.80x = 107,797,507,952.64
  5. Step 5: Solve for x
    x = 107,797,507,952.64/289,772.80
  6. Step 6: Final answer
    x = 372,006.99

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1.5x scale

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.