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Finding the Fourth Proportional to 519,421.34, 780,380.58 and 490,745.72

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Solution

The fourth proportional to 519,421.34, 780,380.58 and 490,745.72 is: 737,298.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,421.34 : 780,380.58 = 490,745.72 : x
  2. Step 2: Convert to fraction form
    519,421.34/780,380.58 = 490,745.72/x
  3. Step 3: Cross multiply
    519,421.34x = 780,380.58 × 490,745.72
  4. Step 4: Simplify right side
    519,421.34x = 382,968,429,606.12
  5. Step 5: Solve for x
    x = 382,968,429,606.12/519,421.34
  6. Step 6: Final answer
    x = 737,298.22

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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.