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Finding the Fourth Proportional to 631,989.32, 872,148.35 and 345,509.42

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Solution

The fourth proportional to 631,989.32, 872,148.35 and 345,509.42 is: 476,804.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,989.32 : 872,148.35 = 345,509.42 : x
  2. Step 2: Convert to fraction form
    631,989.32/872,148.35 = 345,509.42/x
  3. Step 3: Cross multiply
    631,989.32x = 872,148.35 × 345,509.42
  4. Step 4: Simplify right side
    631,989.32x = 301,335,470,562.46
  5. Step 5: Solve for x
    x = 301,335,470,562.46/631,989.32
  6. Step 6: Final answer
    x = 476,804.69

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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.