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Finding the Fourth Proportional to 392,914.40, 589,630.80 and 143,596.40

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Solution

The fourth proportional to 392,914.40, 589,630.80 and 143,596.40 is: 215,489.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,914.40 : 589,630.80 = 143,596.40 : x
  2. Step 2: Convert to fraction form
    392,914.40/589,630.80 = 143,596.40/x
  3. Step 3: Cross multiply
    392,914.40x = 589,630.80 × 143,596.40
  4. Step 4: Simplify right side
    392,914.40x = 84,668,860,209.12
  5. Step 5: Solve for x
    x = 84,668,860,209.12/392,914.40
  6. Step 6: Final answer
    x = 215,489.33

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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.