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Finding the Fourth Proportional to 403,652, 556,112.40 and 318,738.08

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Solution

The fourth proportional to 403,652, 556,112.40 and 318,738.08 is: 439,126.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,652 : 556,112.40 = 318,738.08 : x
  2. Step 2: Convert to fraction form
    403,652/556,112.40 = 318,738.08/x
  3. Step 3: Cross multiply
    403,652x = 556,112.40 × 318,738.08
  4. Step 4: Simplify right side
    403,652x = 177,254,198,640.19
  5. Step 5: Solve for x
    x = 177,254,198,640.19/403,652
  6. Step 6: Final answer
    x = 439,126.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.