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Finding the Fourth Proportional to 630,950.40, 945,561.60 and 405,619.20

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Solution

The fourth proportional to 630,950.40, 945,561.60 and 405,619.20 is: 607,873.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,950.40 : 945,561.60 = 405,619.20 : x
  2. Step 2: Convert to fraction form
    630,950.40/945,561.60 = 405,619.20/x
  3. Step 3: Cross multiply
    630,950.40x = 945,561.60 × 405,619.20
  4. Step 4: Simplify right side
    630,950.40x = 383,537,939,742.72
  5. Step 5: Solve for x
    x = 383,537,939,742.72/630,950.40
  6. Step 6: Final answer
    x = 607,873.36

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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.