Home / 902,171.20-1,245,128.88-520,123.36

Finding the Fourth Proportional to 902,171.20, 1,245,128.88 and 520,123.36

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Solution

The fourth proportional to 902,171.20, 1,245,128.88 and 520,123.36 is: 717,846.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    902,171.20 : 1,245,128.88 = 520,123.36 : x
  2. Step 2: Convert to fraction form
    902,171.20/1,245,128.88 = 520,123.36/x
  3. Step 3: Cross multiply
    902,171.20x = 1,245,128.88 × 520,123.36
  4. Step 4: Simplify right side
    902,171.20x = 647,620,616,698.64
  5. Step 5: Solve for x
    x = 647,620,616,698.64/902,171.20
  6. Step 6: Final answer
    x = 717,846.70

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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.