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Finding the Fourth Proportional to 638,309.10, 956,649.60 and 338,933.10

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Solution

The fourth proportional to 638,309.10, 956,649.60 and 338,933.10 is: 507,967.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,309.10 : 956,649.60 = 338,933.10 : x
  2. Step 2: Convert to fraction form
    638,309.10/956,649.60 = 338,933.10/x
  3. Step 3: Cross multiply
    638,309.10x = 956,649.60 × 338,933.10
  4. Step 4: Simplify right side
    638,309.10x = 324,240,214,541.76
  5. Step 5: Solve for x
    x = 324,240,214,541.76/638,309.10
  6. Step 6: Final answer
    x = 507,967.40

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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.