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Finding the Fourth Proportional to 902,404.80, 1,245,277.80 and 520,408.80

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Solution

The fourth proportional to 902,404.80, 1,245,277.80 and 520,408.80 is: 718,140.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    902,404.80 : 1,245,277.80 = 520,408.80 : x
  2. Step 2: Convert to fraction form
    902,404.80/1,245,277.80 = 520,408.80/x
  3. Step 3: Cross multiply
    902,404.80x = 1,245,277.80 × 520,408.80
  4. Step 4: Simplify right side
    902,404.80x = 648,053,525,564.64
  5. Step 5: Solve for x
    x = 648,053,525,564.64/902,404.80
  6. Step 6: Final answer
    x = 718,140.60

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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.