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Finding the Fourth Proportional to 485,206.39, 669,587.56 and 281,378.33

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Solution

The fourth proportional to 485,206.39, 669,587.56 and 281,378.33 is: 388,303.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,206.39 : 669,587.56 = 281,378.33 : x
  2. Step 2: Convert to fraction form
    485,206.39/669,587.56 = 281,378.33/x
  3. Step 3: Cross multiply
    485,206.39x = 669,587.56 × 281,378.33
  4. Step 4: Simplify right side
    485,206.39x = 188,407,425,855.45
  5. Step 5: Solve for x
    x = 188,407,425,855.45/485,206.39
  6. Step 6: Final answer
    x = 388,303.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.