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Finding the Fourth Proportional to 520,002.40, 780,003.60 and 331,045.60

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Solution

The fourth proportional to 520,002.40, 780,003.60 and 331,045.60 is: 496,568.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,002.40 : 780,003.60 = 331,045.60 : x
  2. Step 2: Convert to fraction form
    520,002.40/780,003.60 = 331,045.60/x
  3. Step 3: Cross multiply
    520,002.40x = 780,003.60 × 331,045.60
  4. Step 4: Simplify right side
    520,002.40x = 258,216,759,764.16
  5. Step 5: Solve for x
    x = 258,216,759,764.16/520,002.40
  6. Step 6: Final answer
    x = 496,568.40

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Similar ratio
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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.