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Finding the Fourth Proportional to 556,778.10, 768,355.90 and 302,129.28

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Solution

The fourth proportional to 556,778.10, 768,355.90 and 302,129.28 is: 416,939.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,778.10 : 768,355.90 = 302,129.28 : x
  2. Step 2: Convert to fraction form
    556,778.10/768,355.90 = 302,129.28/x
  3. Step 3: Cross multiply
    556,778.10x = 768,355.90 × 302,129.28
  4. Step 4: Simplify right side
    556,778.10x = 232,142,814,850.75
  5. Step 5: Solve for x
    x = 232,142,814,850.75/556,778.10
  6. Step 6: Final answer
    x = 416,939.56

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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.