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Finding the Fourth Proportional to 631,917.32, 872,046 and 345,438.56

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Solution

The fourth proportional to 631,917.32, 872,046 and 345,438.56 is: 476,705.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,917.32 : 872,046 = 345,438.56 : x
  2. Step 2: Convert to fraction form
    631,917.32/872,046 = 345,438.56/x
  3. Step 3: Cross multiply
    631,917.32x = 872,046 × 345,438.56
  4. Step 4: Simplify right side
    631,917.32x = 301,238,314,493.76
  5. Step 5: Solve for x
    x = 301,238,314,493.76/631,917.32
  6. Step 6: Final answer
    x = 476,705.27

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1.5x scale

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.