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Finding the Fourth Proportional to 289,682.80, 434,378.40 and 171,390.40

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Solution

The fourth proportional to 289,682.80, 434,378.40 and 171,390.40 is: 256,999.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,682.80 : 434,378.40 = 171,390.40 : x
  2. Step 2: Convert to fraction form
    289,682.80/434,378.40 = 171,390.40/x
  3. Step 3: Cross multiply
    289,682.80x = 434,378.40 × 171,390.40
  4. Step 4: Simplify right side
    289,682.80x = 74,448,287,727.36
  5. Step 5: Solve for x
    x = 74,448,287,727.36/289,682.80
  6. Step 6: Final answer
    x = 256,999.34

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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.