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Finding the Fourth Proportional to 878,157.28, 1,211,858.28 and 475,749.28

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Solution

The fourth proportional to 878,157.28, 1,211,858.28 and 475,749.28 is: 656,534.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,157.28 : 1,211,858.28 = 475,749.28 : x
  2. Step 2: Convert to fraction form
    878,157.28/1,211,858.28 = 475,749.28/x
  3. Step 3: Cross multiply
    878,157.28x = 1,211,858.28 × 475,749.28
  4. Step 4: Simplify right side
    878,157.28x = 576,540,704,172.04
  5. Step 5: Solve for x
    x = 576,540,704,172.04/878,157.28
  6. Step 6: Final answer
    x = 656,534.67

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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.