Home / 289,685.43-434,551.77-145,517.09

Finding the Fourth Proportional to 289,685.43, 434,551.77 and 145,517.09

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Solution

The fourth proportional to 289,685.43, 434,551.77 and 145,517.09 is: 218,287.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,685.43 : 434,551.77 = 145,517.09 : x
  2. Step 2: Convert to fraction form
    289,685.43/434,551.77 = 145,517.09/x
  3. Step 3: Cross multiply
    289,685.43x = 434,551.77 × 145,517.09
  4. Step 4: Simplify right side
    289,685.43x = 63,234,711,743.51
  5. Step 5: Solve for x
    x = 63,234,711,743.51/289,685.43
  6. Step 6: Final answer
    x = 218,287.52

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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.