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Finding the Fourth Proportional to 518,704.80, 777,999.60 and 425,047.20

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Solution

The fourth proportional to 518,704.80, 777,999.60 and 425,047.20 is: 637,523.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,704.80 : 777,999.60 = 425,047.20 : x
  2. Step 2: Convert to fraction form
    518,704.80/777,999.60 = 425,047.20/x
  3. Step 3: Cross multiply
    518,704.80x = 777,999.60 × 425,047.20
  4. Step 4: Simplify right side
    518,704.80x = 330,686,551,581.12
  5. Step 5: Solve for x
    x = 330,686,551,581.12/518,704.80
  6. Step 6: Final answer
    x = 637,523.60

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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.