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Finding the Fourth Proportional to 520,018.40, 780,027.60 and 331,061.60

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Solution

The fourth proportional to 520,018.40, 780,027.60 and 331,061.60 is: 496,592.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,018.40 : 780,027.60 = 331,061.60 : x
  2. Step 2: Convert to fraction form
    520,018.40/780,027.60 = 331,061.60/x
  3. Step 3: Cross multiply
    520,018.40x = 780,027.60 × 331,061.60
  4. Step 4: Simplify right side
    520,018.40x = 258,237,185,300.16
  5. Step 5: Solve for x
    x = 258,237,185,300.16/520,018.40
  6. Step 6: Final answer
    x = 496,592.40

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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.