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Finding the Fourth Proportional to 556,435.36, 767,867.28 and 317,956

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Solution

The fourth proportional to 556,435.36, 767,867.28 and 317,956 is: 438,771.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,435.36 : 767,867.28 = 317,956 : x
  2. Step 2: Convert to fraction form
    556,435.36/767,867.28 = 317,956/x
  3. Step 3: Cross multiply
    556,435.36x = 767,867.28 × 317,956
  4. Step 4: Simplify right side
    556,435.36x = 244,148,008,879.68
  5. Step 5: Solve for x
    x = 244,148,008,879.68/556,435.36
  6. Step 6: Final answer
    x = 438,771.56

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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.