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Finding the Fourth Proportional to 659,078.37, 909,485.31 and 368,639.71

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Solution

The fourth proportional to 659,078.37, 909,485.31 and 368,639.71 is: 508,698.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,078.37 : 909,485.31 = 368,639.71 : x
  2. Step 2: Convert to fraction form
    659,078.37/909,485.31 = 368,639.71/x
  3. Step 3: Cross multiply
    659,078.37x = 909,485.31 × 368,639.71
  4. Step 4: Simplify right side
    659,078.37x = 335,272,400,036.35
  5. Step 5: Solve for x
    x = 335,272,400,036.35/659,078.37
  6. Step 6: Final answer
    x = 508,698.84

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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.